Finding the Fourth Proportional to 12,968,945,217.80, 17,905,929,850.74 and 8,215,439,404.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,968,945,217.80 : 17,905,929,850.74 = 8,215,439,404.04 : x
2. Step 2: Convert to fraction form
   12,968,945,217.80/17,905,929,850.74 = 8,215,439,404.04/x
3. Step 3: Cross multiply
   12,968,945,217.80x = 17,905,929,850.74 × 8,215,439,404.04
4. Step 4: Simplify right side
   12,968,945,217.80x = 147,105,081,661,745,479,680
5. Step 5: Solve for x
   x = 147,105,081,661,745,479,680/12,968,945,217.80
6. Step 6: Final answer
   x = 11,342,871,697.83