Finding the Fourth Proportional to 841,323.54, 1,262,250.86 and 639,884.56

Step by Step Solution

1. Step 1: Write the proportion equation
   841,323.54 : 1,262,250.86 = 639,884.56 : x
2. Step 2: Convert to fraction form
   841,323.54/1,262,250.86 = 639,884.56/x
3. Step 3: Cross multiply
   841,323.54x = 1,262,250.86 × 639,884.56
4. Step 4: Simplify right side
   841,323.54x = 807,694,836,160.72
5. Step 5: Solve for x
   x = 807,694,836,160.72/841,323.54
6. Step 6: Final answer
   x = 960,028.81