Finding the Third Proportional to 255,469 and 392,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   255,469 : 392,131.50 = 392,131.50 : x
2. Step 2: Convert to fraction form
   255,469/392,131.50 = 392,131.50/x
3. Step 3: Cross multiply
   255,469x = 392,131.50 × 392,131.50
4. Step 4: Simplify right side
   255,469x = 153,767,113,292.25
5. Step 5: Solve for x
   x = 153,767,113,292.25/255,469
6. Step 6: Final answer
   x = 601,901.26