Finding the Fourth Proportional to 1,152,522.47, 1,590,689.22 and 687,406.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152,522.47 : 1,590,689.22 = 687,406.19 : x
2. Step 2: Convert to fraction form
   1,152,522.47/1,590,689.22 = 687,406.19/x
3. Step 3: Cross multiply
   1,152,522.47x = 1,590,689.22 × 687,406.19
4. Step 4: Simplify right side
   1,152,522.47x = 1,093,449,616,194.27
5. Step 5: Solve for x
   x = 1,093,449,616,194.27/1,152,522.47
6. Step 6: Final answer
   x = 948,744.73