Finding the Fourth Proportional to 61.55, 91.77 and 59.97

Step by Step Solution

1. Step 1: Write the proportion equation
   61.55 : 91.77 = 59.97 : x
2. Step 2: Convert to fraction form
   61.55/91.77 = 59.97/x
3. Step 3: Cross multiply
   61.55x = 91.77 × 59.97
4. Step 4: Simplify right side
   61.55x = 5,503.15
5. Step 5: Solve for x
   x = 5,503.15/61.55
6. Step 6: Final answer
   x = 89.41