Finding the Fourth Proportional to 100.88, 139.19 and 59.43

Step by Step Solution

1. Step 1: Write the proportion equation
   100.88 : 139.19 = 59.43 : x
2. Step 2: Convert to fraction form
   100.88/139.19 = 59.43/x
3. Step 3: Cross multiply
   100.88x = 139.19 × 59.43
4. Step 4: Simplify right side
   100.88x = 8,271.37
5. Step 5: Solve for x
   x = 8,271.37/100.88
6. Step 6: Final answer
   x = 82.00