Finding the Fourth Proportional to 72.55, 99.98 and 59.39

Step by Step Solution

1. Step 1: Write the proportion equation
   72.55 : 99.98 = 59.39 : x
2. Step 2: Convert to fraction form
   72.55/99.98 = 59.39/x
3. Step 3: Cross multiply
   72.55x = 99.98 × 59.39
4. Step 4: Simplify right side
   72.55x = 5,938.21
5. Step 5: Solve for x
   x = 5,938.21/72.55
6. Step 6: Final answer
   x = 81.85