Finding the Fourth Proportional to 101.31, 139.82 and 59.87

Step by Step Solution

1. Step 1: Write the proportion equation
   101.31 : 139.82 = 59.87 : x
2. Step 2: Convert to fraction form
   101.31/139.82 = 59.87/x
3. Step 3: Cross multiply
   101.31x = 139.82 × 59.87
4. Step 4: Simplify right side
   101.31x = 8,371.02
5. Step 5: Solve for x
   x = 8,371.02/101.31
6. Step 6: Final answer
   x = 82.63