Finding the Fourth Proportional to 61.47, 91.98 and 59.31

Step by Step Solution

1. Step 1: Write the proportion equation
   61.47 : 91.98 = 59.31 : x
2. Step 2: Convert to fraction form
   61.47/91.98 = 59.31/x
3. Step 3: Cross multiply
   61.47x = 91.98 × 59.31
4. Step 4: Simplify right side
   61.47x = 5,455.33
5. Step 5: Solve for x
   x = 5,455.33/61.47
6. Step 6: Final answer
   x = 88.75