Finding the Fourth Proportional to 92.87, 139.31 and 61.01

Step by Step Solution

1. Step 1: Write the proportion equation
   92.87 : 139.31 = 61.01 : x
2. Step 2: Convert to fraction form
   92.87/139.31 = 61.01/x
3. Step 3: Cross multiply
   92.87x = 139.31 × 61.01
4. Step 4: Simplify right side
   92.87x = 8,499.30
5. Step 5: Solve for x
   x = 8,499.30/92.87
6. Step 6: Final answer
   x = 91.52