Finding the Third Proportional to 57,412.50 and 123,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,412.50 : 123,129.50 = 123,129.50 : x
2. Step 2: Convert to fraction form
   57,412.50/123,129.50 = 123,129.50/x
3. Step 3: Cross multiply
   57,412.50x = 123,129.50 × 123,129.50
4. Step 4: Simplify right side
   57,412.50x = 15,160,873,770.25
5. Step 5: Solve for x
   x = 15,160,873,770.25/57,412.50
6. Step 6: Final answer
   x = 264,069.21