Finding the Fourth Proportional to 498,300.08, 687,644.52 and 271,947.20

Step by Step Solution

1. Step 1: Write the proportion equation
   498,300.08 : 687,644.52 = 271,947.20 : x
2. Step 2: Convert to fraction form
   498,300.08/687,644.52 = 271,947.20/x
3. Step 3: Cross multiply
   498,300.08x = 687,644.52 × 271,947.20
4. Step 4: Simplify right side
   498,300.08x = 187,003,001,809.34
5. Step 5: Solve for x
   x = 187,003,001,809.34/498,300.08
6. Step 6: Final answer
   x = 375,281.90