Finding the Fourth Proportional to 99.29, 148.94 and 42.25

Step by Step Solution

1. Step 1: Write the proportion equation
   99.29 : 148.94 = 42.25 : x
2. Step 2: Convert to fraction form
   99.29/148.94 = 42.25/x
3. Step 3: Cross multiply
   99.29x = 148.94 × 42.25
4. Step 4: Simplify right side
   99.29x = 6,292.50
5. Step 5: Solve for x
   x = 6,292.50/99.29
6. Step 6: Final answer
   x = 63.38