Finding the Fourth Proportional to 100.88, 139.25 and 59.47

Step by Step Solution

1. Step 1: Write the proportion equation
   100.88 : 139.25 = 59.47 : x
2. Step 2: Convert to fraction form
   100.88/139.25 = 59.47/x
3. Step 3: Cross multiply
   100.88x = 139.25 × 59.47
4. Step 4: Simplify right side
   100.88x = 8,281.00
5. Step 5: Solve for x
   x = 8,281.00/100.88
6. Step 6: Final answer
   x = 82.09