Finding the Fourth Proportional to 2,631,187.50, 3,947,405.25 and 858,259.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631,187.50 : 3,947,405.25 = 858,259.50 : x
2. Step 2: Convert to fraction form
   2,631,187.50/3,947,405.25 = 858,259.50/x
3. Step 3: Cross multiply
   2,631,187.50x = 3,947,405.25 × 858,259.50
4. Step 4: Simplify right side
   2,631,187.50x = 3,387,898,056,162.38
5. Step 5: Solve for x
   x = 3,387,898,056,162.38/2,631,187.50
6. Step 6: Final answer
   x = 1,287,592.79