Finding the Fourth Proportional to 1,388,072.49, 1,915,545.17 and 807,434.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,072.49 : 1,915,545.17 = 807,434.93 : x
2. Step 2: Convert to fraction form
   1,388,072.49/1,915,545.17 = 807,434.93/x
3. Step 3: Cross multiply
   1,388,072.49x = 1,915,545.17 × 807,434.93
4. Step 4: Simplify right side
   1,388,072.49x = 1,546,678,066,635.89
5. Step 5: Solve for x
   x = 1,546,678,066,635.89/1,388,072.49
6. Step 6: Final answer
   x = 1,114,263.18