Finding the Third Proportional to 127,299.75 and 279,061.50

Step by Step Solution

1. Step 1: Write the proportion equation
   127,299.75 : 279,061.50 = 279,061.50 : x
2. Step 2: Convert to fraction form
   127,299.75/279,061.50 = 279,061.50/x
3. Step 3: Cross multiply
   127,299.75x = 279,061.50 × 279,061.50
4. Step 4: Simplify right side
   127,299.75x = 77,875,320,782.25
5. Step 5: Solve for x
   x = 77,875,320,782.25/127,299.75
6. Step 6: Final answer
   x = 611,747.63