Finding the Fourth Proportional to 61.15, 91.23 and 59.10

Step by Step Solution

1. Step 1: Write the proportion equation
   61.15 : 91.23 = 59.10 : x
2. Step 2: Convert to fraction form
   61.15/91.23 = 59.10/x
3. Step 3: Cross multiply
   61.15x = 91.23 × 59.10
4. Step 4: Simplify right side
   61.15x = 5,391.69
5. Step 5: Solve for x
   x = 5,391.69/61.15
6. Step 6: Final answer
   x = 88.17