Finding the Fourth Proportional to 9,266,916, 12,787,821.12 and 5,400,066.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,266,916 : 12,787,821.12 = 5,400,066.72 : x
2. Step 2: Convert to fraction form
   9,266,916/12,787,821.12 = 5,400,066.72/x
3. Step 3: Cross multiply
   9,266,916x = 12,787,821.12 × 5,400,066.72
4. Step 4: Simplify right side
   9,266,916x = 69,055,087,251,425.12
5. Step 5: Solve for x
   x = 69,055,087,251,425.12/9,266,916
6. Step 6: Final answer
   x = 7,451,787.33