Finding the Fourth Proportional to 12,968,868.48, 17,899,215.72 and 8,780,654.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,968,868.48 : 17,899,215.72 = 8,780,654.12 : x
2. Step 2: Convert to fraction form
   12,968,868.48/17,899,215.72 = 8,780,654.12/x
3. Step 3: Cross multiply
   12,968,868.48x = 17,899,215.72 × 8,780,654.12
4. Step 4: Simplify right side
   12,968,868.48x = 157,166,822,256,586.75
5. Step 5: Solve for x
   x = 157,166,822,256,586.75/12,968,868.48
6. Step 6: Final answer
   x = 12,118,776.78