Finding the Fourth Proportional to 272,009.30, 408,071.55 and 82,454.10

Step by Step Solution

1. Step 1: Write the proportion equation
   272,009.30 : 408,071.55 = 82,454.10 : x
2. Step 2: Convert to fraction form
   272,009.30/408,071.55 = 82,454.10/x
3. Step 3: Cross multiply
   272,009.30x = 408,071.55 × 82,454.10
4. Step 4: Simplify right side
   272,009.30x = 33,647,172,390.86
5. Step 5: Solve for x
   x = 33,647,172,390.86/272,009.30
6. Step 6: Final answer
   x = 123,698.61