Finding the Fourth Proportional to 272,019.30, 408,086.55 and 82,464.10

Step by Step Solution

1. Step 1: Write the proportion equation
   272,019.30 : 408,086.55 = 82,464.10 : x
2. Step 2: Convert to fraction form
   272,019.30/408,086.55 = 82,464.10/x
3. Step 3: Cross multiply
   272,019.30x = 408,086.55 × 82,464.10
4. Step 4: Simplify right side
   272,019.30x = 33,652,490,067.86
5. Step 5: Solve for x
   x = 33,652,490,067.86/272,019.30
6. Step 6: Final answer
   x = 123,713.61