Finding the Fourth Proportional to 99.62, 149.34 and 69.15

Step by Step Solution

1. Step 1: Write the proportion equation
   99.62 : 149.34 = 69.15 : x
2. Step 2: Convert to fraction form
   99.62/149.34 = 69.15/x
3. Step 3: Cross multiply
   99.62x = 149.34 × 69.15
4. Step 4: Simplify right side
   99.62x = 10,326.86
5. Step 5: Solve for x
   x = 10,326.86/99.62
6. Step 6: Final answer
   x = 103.66