Finding the Third Proportional to 151,403 and 318,488.50

Step by Step Solution

1. Step 1: Write the proportion equation
   151,403 : 318,488.50 = 318,488.50 : x
2. Step 2: Convert to fraction form
   151,403/318,488.50 = 318,488.50/x
3. Step 3: Cross multiply
   151,403x = 318,488.50 × 318,488.50
4. Step 4: Simplify right side
   151,403x = 101,434,924,632.25
5. Step 5: Solve for x
   x = 101,434,924,632.25/151,403
6. Step 6: Final answer
   x = 669,966.41