Finding the Third Proportional to 280,617.50 and 615,564

Step by Step Solution

1. Step 1: Write the proportion equation
   280,617.50 : 615,564 = 615,564 : x
2. Step 2: Convert to fraction form
   280,617.50/615,564 = 615,564/x
3. Step 3: Cross multiply
   280,617.50x = 615,564 × 615,564
4. Step 4: Simplify right side
   280,617.50x = 378,919,038,096
5. Step 5: Solve for x
   x = 378,919,038,096/280,617.50
6. Step 6: Final answer
   x = 1,350,304.38