Finding the Fourth Proportional to 1,152,498.16, 1,590,558 and 643,247.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152,498.16 : 1,590,558 = 643,247.92 : x
2. Step 2: Convert to fraction form
   1,152,498.16/1,590,558 = 643,247.92/x
3. Step 3: Cross multiply
   1,152,498.16x = 1,590,558 × 643,247.92
4. Step 4: Simplify right side
   1,152,498.16x = 1,023,123,125,139.36
5. Step 5: Solve for x
   x = 1,023,123,125,139.36/1,152,498.16
6. Step 6: Final answer
   x = 887,743.83