Finding the Fourth Proportional to 12,905,716.48, 17,815,935.36 and 7,472,158.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,905,716.48 : 17,815,935.36 = 7,472,158.72 : x
2. Step 2: Convert to fraction form
   12,905,716.48/17,815,935.36 = 7,472,158.72/x
3. Step 3: Cross multiply
   12,905,716.48x = 17,815,935.36 × 7,472,158.72
4. Step 4: Simplify right side
   12,905,716.48x = 133,123,496,755,180.33
5. Step 5: Solve for x
   x = 133,123,496,755,180.33/12,905,716.48
6. Step 6: Final answer
   x = 10,315,079.91