Finding the Fourth Proportional to 12,992,855.76, 17,929,683.72 and 7,191,648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,992,855.76 : 17,929,683.72 = 7,191,648.72 : x
2. Step 2: Convert to fraction form
   12,992,855.76/17,929,683.72 = 7,191,648.72/x
3. Step 3: Cross multiply
   12,992,855.76x = 17,929,683.72 × 7,191,648.72
4. Step 4: Simplify right side
   12,992,855.76x = 128,943,986,974,942.83
5. Step 5: Solve for x
   x = 128,943,986,974,942.83/12,992,855.76
6. Step 6: Final answer
   x = 9,924,222.15