Finding the Fourth Proportional to 498,865.22, 688,419.56 and 272,510.72

Step by Step Solution

1. Step 1: Write the proportion equation
   498,865.22 : 688,419.56 = 272,510.72 : x
2. Step 2: Convert to fraction form
   498,865.22/688,419.56 = 272,510.72/x
3. Step 3: Cross multiply
   498,865.22x = 688,419.56 × 272,510.72
4. Step 4: Simplify right side
   498,865.22x = 187,601,707,196.86
5. Step 5: Solve for x
   x = 187,601,707,196.86/498,865.22
6. Step 6: Final answer
   x = 376,056.90