Finding the Fourth Proportional to 72,108.68, 99,537.35 and 54,255.59

Step by Step Solution

1. Step 1: Write the proportion equation
   72,108.68 : 99,537.35 = 54,255.59 : x
2. Step 2: Convert to fraction form
   72,108.68/99,537.35 = 54,255.59/x
3. Step 3: Cross multiply
   72,108.68x = 99,537.35 × 54,255.59
4. Step 4: Simplify right side
   72,108.68x = 5,400,456,882.32
5. Step 5: Solve for x
   x = 5,400,456,882.32/72,108.68
6. Step 6: Final answer
   x = 74,893.30