Finding the Fourth Proportional to 2,631,187, 3,947,404.50 and 858,259

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631,187 : 3,947,404.50 = 858,259 : x
2. Step 2: Convert to fraction form
   2,631,187/3,947,404.50 = 858,259/x
3. Step 3: Cross multiply
   2,631,187x = 3,947,404.50 × 858,259
4. Step 4: Simplify right side
   2,631,187x = 3,387,895,438,765.50
5. Step 5: Solve for x
   x = 3,387,895,438,765.50/2,631,187
6. Step 6: Final answer
   x = 1,287,592.04