Finding the Fourth Proportional to 837,046.47, 1,155,680.43 and 643,108.71

Step by Step Solution

1. Step 1: Write the proportion equation
   837,046.47 : 1,155,680.43 = 643,108.71 : x
2. Step 2: Convert to fraction form
   837,046.47/1,155,680.43 = 643,108.71/x
3. Step 3: Cross multiply
   837,046.47x = 1,155,680.43 × 643,108.71
4. Step 4: Simplify right side
   837,046.47x = 743,228,150,509.55
5. Step 5: Solve for x
   x = 743,228,150,509.55/837,046.47
6. Step 6: Final answer
   x = 887,917.43