Finding the Fourth Proportional to 1,388,077.62, 1,915,552.25 and 807,440.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,077.62 : 1,915,552.25 = 807,440.05 : x
2. Step 2: Convert to fraction form
   1,388,077.62/1,915,552.25 = 807,440.05/x
3. Step 3: Cross multiply
   1,388,077.62x = 1,915,552.25 × 807,440.05
4. Step 4: Simplify right side
   1,388,077.62x = 1,546,693,604,517.61
5. Step 5: Solve for x
   x = 1,546,693,604,517.61/1,388,077.62
6. Step 6: Final answer
   x = 1,114,270.26