Finding the Fourth Proportional to 99.96, 149.56 and 84.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99.96 : 149.56 = 84.72 : x
2. Step 2: Convert to fraction form
   99.96/149.56 = 84.72/x
3. Step 3: Cross multiply
   99.96x = 149.56 × 84.72
4. Step 4: Simplify right side
   99.96x = 12,670.72
5. Step 5: Solve for x
   x = 12,670.72/99.96
6. Step 6: Final answer
   x = 126.76