Finding the Fourth Proportional to 93.31, 139.86 and 52.71

Step by Step Solution

1. Step 1: Write the proportion equation
   93.31 : 139.86 = 52.71 : x
2. Step 2: Convert to fraction form
   93.31/139.86 = 52.71/x
3. Step 3: Cross multiply
   93.31x = 139.86 × 52.71
4. Step 4: Simplify right side
   93.31x = 7,371.50
5. Step 5: Solve for x
   x = 7,371.50/93.31
6. Step 6: Final answer
   x = 79.00