Finding the Fourth Proportional to 82,354.34, 123,478.17 and 54,189.11

Step by Step Solution

1. Step 1: Write the proportion equation
   82,354.34 : 123,478.17 = 54,189.11 : x
2. Step 2: Convert to fraction form
   82,354.34/123,478.17 = 54,189.11/x
3. Step 3: Cross multiply
   82,354.34x = 123,478.17 × 54,189.11
4. Step 4: Simplify right side
   82,354.34x = 6,691,171,519.34
5. Step 5: Solve for x
   x = 6,691,171,519.34/82,354.34
6. Step 6: Final answer
   x = 81,248.56