Finding the Fourth Proportional to 1,388,073.62, 1,915,546.72 and 807,436.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,073.62 : 1,915,546.72 = 807,436.05 : x
2. Step 2: Convert to fraction form
   1,388,073.62/1,915,546.72 = 807,436.05/x
3. Step 3: Cross multiply
   1,388,073.62x = 1,915,546.72 × 807,436.05
4. Step 4: Simplify right side
   1,388,073.62x = 1,546,681,475,168.67
5. Step 5: Solve for x
   x = 1,546,681,475,168.67/1,388,073.62
6. Step 6: Final answer
   x = 1,114,264.73