Finding the Third Proportional to 357,319.50 and 784,630

Step by Step Solution

1. Step 1: Write the proportion equation
   357,319.50 : 784,630 = 784,630 : x
2. Step 2: Convert to fraction form
   357,319.50/784,630 = 784,630/x
3. Step 3: Cross multiply
   357,319.50x = 784,630 × 784,630
4. Step 4: Simplify right side
   357,319.50x = 615,644,236,900
5. Step 5: Solve for x
   x = 615,644,236,900/357,319.50
6. Step 6: Final answer
   x = 1,722,951.69