Finding the Fourth Proportional to 114.72, 171.90 and 99.48

Step by Step Solution

1. Step 1: Write the proportion equation
   114.72 : 171.90 = 99.48 : x
2. Step 2: Convert to fraction form
   114.72/171.90 = 99.48/x
3. Step 3: Cross multiply
   114.72x = 171.90 × 99.48
4. Step 4: Simplify right side
   114.72x = 17,100.61
5. Step 5: Solve for x
   x = 17,100.61/114.72
6. Step 6: Final answer
   x = 149.06