Finding the Fourth Proportional to 1,857,877.59, 2,786,147.72 and 643,124.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,857,877.59 : 2,786,147.72 = 643,124.15 : x
2. Step 2: Convert to fraction form
   1,857,877.59/2,786,147.72 = 643,124.15/x
3. Step 3: Cross multiply
   1,857,877.59x = 2,786,147.72 × 643,124.15
4. Step 4: Simplify right side
   1,857,877.59x = 1,791,838,895,584.93
5. Step 5: Solve for x
   x = 1,791,838,895,584.93/1,857,877.59
6. Step 6: Final answer
   x = 964,454.77