Finding the Third Proportional to 531,724 and 817,300

Step by Step Solution

1. Step 1: Write the proportion equation
   531,724 : 817,300 = 817,300 : x
2. Step 2: Convert to fraction form
   531,724/817,300 = 817,300/x
3. Step 3: Cross multiply
   531,724x = 817,300 × 817,300
4. Step 4: Simplify right side
   531,724x = 667,979,290,000
5. Step 5: Solve for x
   x = 667,979,290,000/531,724
6. Step 6: Final answer
   x = 1,256,251.91