Finding the Third Proportional to 256,721.50 and 572,472

Step by Step Solution

1. Step 1: Write the proportion equation
   256,721.50 : 572,472 = 572,472 : x
2. Step 2: Convert to fraction form
   256,721.50/572,472 = 572,472/x
3. Step 3: Cross multiply
   256,721.50x = 572,472 × 572,472
4. Step 4: Simplify right side
   256,721.50x = 327,724,190,784
5. Step 5: Solve for x
   x = 327,724,190,784/256,721.50
6. Step 6: Final answer
   x = 1,276,574.77