Finding the Third Proportional to 298,680 and 625,020

Step by Step Solution

1. Step 1: Write the proportion equation
   298,680 : 625,020 = 625,020 : x
2. Step 2: Convert to fraction form
   298,680/625,020 = 625,020/x
3. Step 3: Cross multiply
   298,680x = 625,020 × 625,020
4. Step 4: Simplify right side
   298,680x = 390,650,000,400
5. Step 5: Solve for x
   x = 390,650,000,400/298,680
6. Step 6: Final answer
   x = 1,307,921.52