Finding the Fourth Proportional to 100.89, 139.23 and 59.48

Step by Step Solution

1. Step 1: Write the proportion equation
   100.89 : 139.23 = 59.48 : x
2. Step 2: Convert to fraction form
   100.89/139.23 = 59.48/x
3. Step 3: Cross multiply
   100.89x = 139.23 × 59.48
4. Step 4: Simplify right side
   100.89x = 8,280.70
5. Step 5: Solve for x
   x = 8,280.70/100.89
6. Step 6: Final answer
   x = 82.08