Finding the Fourth Proportional to 61.31, 91.73 and 60.87

Step by Step Solution

1. Step 1: Write the proportion equation
   61.31 : 91.73 = 60.87 : x
2. Step 2: Convert to fraction form
   61.31/91.73 = 60.87/x
3. Step 3: Cross multiply
   61.31x = 91.73 × 60.87
4. Step 4: Simplify right side
   61.31x = 5,584.10
5. Step 5: Solve for x
   x = 5,584.10/61.31
6. Step 6: Final answer
   x = 91.08