Finding the Fourth Proportional to 72.53, 99.87 and 54.10

Step by Step Solution

1. Step 1: Write the proportion equation
   72.53 : 99.87 = 54.10 : x
2. Step 2: Convert to fraction form
   72.53/99.87 = 54.10/x
3. Step 3: Cross multiply
   72.53x = 99.87 × 54.10
4. Step 4: Simplify right side
   72.53x = 5,402.89
5. Step 5: Solve for x
   x = 5,402.89/72.53
6. Step 6: Final answer
   x = 74.49