Finding the Third Proportional to 428,613.75 and 587,746.50

Step by Step Solution

1. Step 1: Write the proportion equation
   428,613.75 : 587,746.50 = 587,746.50 : x
2. Step 2: Convert to fraction form
   428,613.75/587,746.50 = 587,746.50/x
3. Step 3: Cross multiply
   428,613.75x = 587,746.50 × 587,746.50
4. Step 4: Simplify right side
   428,613.75x = 345,445,948,262.25
5. Step 5: Solve for x
   x = 345,445,948,262.25/428,613.75
6. Step 6: Final answer
   x = 805,960.96