Finding the Third Proportional to 125,147.50 and 254,642

Step by Step Solution

1. Step 1: Write the proportion equation
   125,147.50 : 254,642 = 254,642 : x
2. Step 2: Convert to fraction form
   125,147.50/254,642 = 254,642/x
3. Step 3: Cross multiply
   125,147.50x = 254,642 × 254,642
4. Step 4: Simplify right side
   125,147.50x = 64,842,548,164
5. Step 5: Solve for x
   x = 64,842,548,164/125,147.50
6. Step 6: Final answer
   x = 518,128.99