Finding the Fourth Proportional to 1,152,725.52, 1,590,708.84 and 643,416.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152,725.52 : 1,590,708.84 = 643,416.72 : x
2. Step 2: Convert to fraction form
   1,152,725.52/1,590,708.84 = 643,416.72/x
3. Step 3: Cross multiply
   1,152,725.52x = 1,590,708.84 × 643,416.72
4. Step 4: Simplify right side
   1,152,725.52x = 1,023,488,664,307.80
5. Step 5: Solve for x
   x = 1,023,488,664,307.80/1,152,725.52
6. Step 6: Final answer
   x = 887,885.84