Finding the Third Proportional to 569,421 and 857,857.50

Step by Step Solution

1. Step 1: Write the proportion equation
   569,421 : 857,857.50 = 857,857.50 : x
2. Step 2: Convert to fraction form
   569,421/857,857.50 = 857,857.50/x
3. Step 3: Cross multiply
   569,421x = 857,857.50 × 857,857.50
4. Step 4: Simplify right side
   569,421x = 735,919,490,306.25
5. Step 5: Solve for x
   x = 735,919,490,306.25/569,421
6. Step 6: Final answer
   x = 1,292,399.63