Finding the Fourth Proportional to 1,152,648.38, 1,590,671.16 and 643,350.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152,648.38 : 1,590,671.16 = 643,350.75 : x
2. Step 2: Convert to fraction form
   1,152,648.38/1,590,671.16 = 643,350.75/x
3. Step 3: Cross multiply
   1,152,648.38x = 1,590,671.16 × 643,350.75
4. Step 4: Simplify right side
   1,152,648.38x = 1,023,359,483,789.37
5. Step 5: Solve for x
   x = 1,023,359,483,789.37/1,152,648.38
6. Step 6: Final answer
   x = 887,833.19