Finding the Fourth Proportional to 498,300.58, 687,645.21 and 271,947.70

Step by Step Solution

1. Step 1: Write the proportion equation
   498,300.58 : 687,645.21 = 271,947.70 : x
2. Step 2: Convert to fraction form
   498,300.58/687,645.21 = 271,947.70/x
3. Step 3: Cross multiply
   498,300.58x = 687,645.21 × 271,947.70
4. Step 4: Simplify right side
   498,300.58x = 187,003,533,275.52
5. Step 5: Solve for x
   x = 187,003,533,275.52/498,300.58
6. Step 6: Final answer
   x = 375,282.59