Finding the Fourth Proportional to 72,402.89, 99,754.90 and 54,171.52

Step by Step Solution

1. Step 1: Write the proportion equation
   72,402.89 : 99,754.90 = 54,171.52 : x
2. Step 2: Convert to fraction form
   72,402.89/99,754.90 = 54,171.52/x
3. Step 3: Cross multiply
   72,402.89x = 99,754.90 × 54,171.52
4. Step 4: Simplify right side
   72,402.89x = 5,403,874,175.63
5. Step 5: Solve for x
   x = 5,403,874,175.63/72,402.89
6. Step 6: Final answer
   x = 74,636.17