Finding the Fourth Proportional to 100.71, 139.01 and 69.67

Step by Step Solution

1. Step 1: Write the proportion equation
   100.71 : 139.01 = 69.67 : x
2. Step 2: Convert to fraction form
   100.71/139.01 = 69.67/x
3. Step 3: Cross multiply
   100.71x = 139.01 × 69.67
4. Step 4: Simplify right side
   100.71x = 9,684.83
5. Step 5: Solve for x
   x = 9,684.83/100.71
6. Step 6: Final answer
   x = 96.17