Finding the Fourth Proportional to 100.82, 139.13 and 59.37

Step by Step Solution

1. Step 1: Write the proportion equation
   100.82 : 139.13 = 59.37 : x
2. Step 2: Convert to fraction form
   100.82/139.13 = 59.37/x
3. Step 3: Cross multiply
   100.82x = 139.13 × 59.37
4. Step 4: Simplify right side
   100.82x = 8,259.47
5. Step 5: Solve for x
   x = 8,259.47/100.82
6. Step 6: Final answer
   x = 81.92