Finding the Fourth Proportional to 498,870.72, 688,443.70 and 272,521.08

Step by Step Solution

1. Step 1: Write the proportion equation
   498,870.72 : 688,443.70 = 272,521.08 : x
2. Step 2: Convert to fraction form
   498,870.72/688,443.70 = 272,521.08/x
3. Step 3: Cross multiply
   498,870.72x = 688,443.70 × 272,521.08
4. Step 4: Simplify right side
   498,870.72x = 187,615,420,643.20
5. Step 5: Solve for x
   x = 187,615,420,643.20/498,870.72
6. Step 6: Final answer
   x = 376,080.24