Finding the Third Proportional to 257,459.25 and 560,688

Step by Step Solution

1. Step 1: Write the proportion equation
   257,459.25 : 560,688 = 560,688 : x
2. Step 2: Convert to fraction form
   257,459.25/560,688 = 560,688/x
3. Step 3: Cross multiply
   257,459.25x = 560,688 × 560,688
4. Step 4: Simplify right side
   257,459.25x = 314,371,033,344
5. Step 5: Solve for x
   x = 314,371,033,344/257,459.25
6. Step 6: Final answer
   x = 1,221,051.62