Finding the Fourth Proportional to 100.96, 139.36 and 69.98

Step by Step Solution

1. Step 1: Write the proportion equation
   100.96 : 139.36 = 69.98 : x
2. Step 2: Convert to fraction form
   100.96/139.36 = 69.98/x
3. Step 3: Cross multiply
   100.96x = 139.36 × 69.98
4. Step 4: Simplify right side
   100.96x = 9,751.72
5. Step 5: Solve for x
   x = 9,751.72/100.96
6. Step 6: Final answer
   x = 96.59