Finding the Fourth Proportional to 100.94, 139.30 and 59.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100.94 : 139.30 = 59.50 : x
2. Step 2: Convert to fraction form
   100.94/139.30 = 59.50/x
3. Step 3: Cross multiply
   100.94x = 139.30 × 59.50
4. Step 4: Simplify right side
   100.94x = 8,288.05
5. Step 5: Solve for x
   x = 8,288.05/100.94
6. Step 6: Final answer
   x = 82.11