Finding the Third Proportional to 392,419 and 607,504.50

Step by Step Solution

1. Step 1: Write the proportion equation
   392,419 : 607,504.50 = 607,504.50 : x
2. Step 2: Convert to fraction form
   392,419/607,504.50 = 607,504.50/x
3. Step 3: Cross multiply
   392,419x = 607,504.50 × 607,504.50
4. Step 4: Simplify right side
   392,419x = 369,061,717,520.25
5. Step 5: Solve for x
   x = 369,061,717,520.25/392,419
6. Step 6: Final answer
   x = 940,478.72