Finding the Third Proportional to 256,262.50 and 560,790

Step by Step Solution

1. Step 1: Write the proportion equation
   256,262.50 : 560,790 = 560,790 : x
2. Step 2: Convert to fraction form
   256,262.50/560,790 = 560,790/x
3. Step 3: Cross multiply
   256,262.50x = 560,790 × 560,790
4. Step 4: Simplify right side
   256,262.50x = 314,485,424,100
5. Step 5: Solve for x
   x = 314,485,424,100/256,262.50
6. Step 6: Final answer
   x = 1,227,200.33