Finding the Third Proportional to 42.50 and 99.13

Step by Step Solution

1. Step 1: Write the proportion equation
   42.50 : 99.13 = 99.13 : x
2. Step 2: Convert to fraction form
   42.50/99.13 = 99.13/x
3. Step 3: Cross multiply
   42.50x = 99.13 × 99.13
4. Step 4: Simplify right side
   42.50x = 9,825.77
5. Step 5: Solve for x
   x = 9,825.77/42.50
6. Step 6: Final answer
   x = 231.19