Finding the Fourth Proportional to 99.31, 148.94 and 34.31

Step by Step Solution

1. Step 1: Write the proportion equation
   99.31 : 148.94 = 34.31 : x
2. Step 2: Convert to fraction form
   99.31/148.94 = 34.31/x
3. Step 3: Cross multiply
   99.31x = 148.94 × 34.31
4. Step 4: Simplify right side
   99.31x = 5,110.13
5. Step 5: Solve for x
   x = 5,110.13/99.31
6. Step 6: Final answer
   x = 51.46