Finding the Fourth Proportional to 100.94, 139.25 and 69.86

Step by Step Solution

1. Step 1: Write the proportion equation
   100.94 : 139.25 = 69.86 : x
2. Step 2: Convert to fraction form
   100.94/139.25 = 69.86/x
3. Step 3: Cross multiply
   100.94x = 139.25 × 69.86
4. Step 4: Simplify right side
   100.94x = 9,726.96
5. Step 5: Solve for x
   x = 9,726.96/100.94
6. Step 6: Final answer
   x = 96.37