Finding the Third Proportional to 256,756.50 and 554,109

Step by Step Solution

1. Step 1: Write the proportion equation
   256,756.50 : 554,109 = 554,109 : x
2. Step 2: Convert to fraction form
   256,756.50/554,109 = 554,109/x
3. Step 3: Cross multiply
   256,756.50x = 554,109 × 554,109
4. Step 4: Simplify right side
   256,756.50x = 307,036,783,881
5. Step 5: Solve for x
   x = 307,036,783,881/256,756.50
6. Step 6: Final answer
   x = 1,195,828.67