Finding the Third Proportional to 99,540 and 154,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,540 : 154,129.50 = 154,129.50 : x
2. Step 2: Convert to fraction form
   99,540/154,129.50 = 154,129.50/x
3. Step 3: Cross multiply
   99,540x = 154,129.50 × 154,129.50
4. Step 4: Simplify right side
   99,540x = 23,755,902,770.25
5. Step 5: Solve for x
   x = 23,755,902,770.25/99,540
6. Step 6: Final answer
   x = 238,656.85