Finding the Fourth Proportional to 1,245,862.50, 1,869,105.87 and 359,398.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,245,862.50 : 1,869,105.87 = 359,398.50 : x
2. Step 2: Convert to fraction form
   1,245,862.50/1,869,105.87 = 359,398.50/x
3. Step 3: Cross multiply
   1,245,862.50x = 1,869,105.87 × 359,398.50
4. Step 4: Simplify right side
   1,245,862.50x = 671,753,846,019.20
5. Step 5: Solve for x
   x = 671,753,846,019.20/1,245,862.50
6. Step 6: Final answer
   x = 539,187.79