Finding the Fourth Proportional to 100.71, 139.32 and 97.07

Step by Step Solution

1. Step 1: Write the proportion equation
   100.71 : 139.32 = 97.07 : x
2. Step 2: Convert to fraction form
   100.71/139.32 = 97.07/x
3. Step 3: Cross multiply
   100.71x = 139.32 × 97.07
4. Step 4: Simplify right side
   100.71x = 13,523.10
5. Step 5: Solve for x
   x = 13,523.10/100.71
6. Step 6: Final answer
   x = 134.28