Finding the Third Proportional to 99.31 and 153.77

Step by Step Solution

1. Step 1: Write the proportion equation
   99.31 : 153.77 = 153.77 : x
2. Step 2: Convert to fraction form
   99.31/153.77 = 153.77/x
3. Step 3: Cross multiply
   99.31x = 153.77 × 153.77
4. Step 4: Simplify right side
   99.31x = 23,646.27
5. Step 5: Solve for x
   x = 23,646.27/99.31
6. Step 6: Final answer
   x = 238.10