Finding the Fourth Proportional to 542,499.53, 813,793.67 and 272,488.83

Step by Step Solution

1. Step 1: Write the proportion equation
   542,499.53 : 813,793.67 = 272,488.83 : x
2. Step 2: Convert to fraction form
   542,499.53/813,793.67 = 272,488.83/x
3. Step 3: Cross multiply
   542,499.53x = 813,793.67 × 272,488.83
4. Step 4: Simplify right side
   542,499.53x = 221,749,681,607.37
5. Step 5: Solve for x
   x = 221,749,681,607.37/542,499.53
6. Step 6: Final answer
   x = 408,755.53