Finding the Third Proportional to 256,830 and 551,892

Step by Step Solution

1. Step 1: Write the proportion equation
   256,830 : 551,892 = 551,892 : x
2. Step 2: Convert to fraction form
   256,830/551,892 = 551,892/x
3. Step 3: Cross multiply
   256,830x = 551,892 × 551,892
4. Step 4: Simplify right side
   256,830x = 304,584,779,664
5. Step 5: Solve for x
   x = 304,584,779,664/256,830
6. Step 6: Final answer
   x = 1,185,939.26