Finding the Third Proportional to 428,614.50 and 587,748

Step by Step Solution

1. Step 1: Write the proportion equation
   428,614.50 : 587,748 = 587,748 : x
2. Step 2: Convert to fraction form
   428,614.50/587,748 = 587,748/x
3. Step 3: Cross multiply
   428,614.50x = 587,748 × 587,748
4. Step 4: Simplify right side
   428,614.50x = 345,447,711,504
5. Step 5: Solve for x
   x = 345,447,711,504/428,614.50
6. Step 6: Final answer
   x = 805,963.66