Finding the Third Proportional to 129,099 and 171,382.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,099 : 171,382.50 = 171,382.50 : x
2. Step 2: Convert to fraction form
   129,099/171,382.50 = 171,382.50/x
3. Step 3: Cross multiply
   129,099x = 171,382.50 × 171,382.50
4. Step 4: Simplify right side
   129,099x = 29,371,961,306.25
5. Step 5: Solve for x
   x = 29,371,961,306.25/129,099
6. Step 6: Final answer
   x = 227,515.02