Finding the Fourth Proportional to 12,865,917.60, 17,754,158.88 and 7,064,658.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,865,917.60 : 17,754,158.88 = 7,064,658.72 : x
2. Step 2: Convert to fraction form
   12,865,917.60/17,754,158.88 = 7,064,658.72/x
3. Step 3: Cross multiply
   12,865,917.60x = 17,754,158.88 × 7,064,658.72
4. Step 4: Simplify right side
   12,865,917.60x = 125,427,073,347,857.42
5. Step 5: Solve for x
   x = 125,427,073,347,857.42/12,865,917.60
6. Step 6: Final answer
   x = 9,748,785.69