Finding the Third Proportional to 322,120.50 and 686,898

Step by Step Solution

1. Step 1: Write the proportion equation
   322,120.50 : 686,898 = 686,898 : x
2. Step 2: Convert to fraction form
   322,120.50/686,898 = 686,898/x
3. Step 3: Cross multiply
   322,120.50x = 686,898 × 686,898
4. Step 4: Simplify right side
   322,120.50x = 471,828,862,404
5. Step 5: Solve for x
   x = 471,828,862,404/322,120.50
6. Step 6: Final answer
   x = 1,464,758.88