Finding the Third Proportional to 489,315 and 756,238.50

Step by Step Solution

1. Step 1: Write the proportion equation
   489,315 : 756,238.50 = 756,238.50 : x
2. Step 2: Convert to fraction form
   489,315/756,238.50 = 756,238.50/x
3. Step 3: Cross multiply
   489,315x = 756,238.50 × 756,238.50
4. Step 4: Simplify right side
   489,315x = 571,896,668,882.25
5. Step 5: Solve for x
   x = 571,896,668,882.25/489,315
6. Step 6: Final answer
   x = 1,168,769.95