Finding the Third Proportional to 686,572 and 1,435,920

Step by Step Solution

1. Step 1: Write the proportion equation
   686,572 : 1,435,920 = 1,435,920 : x
2. Step 2: Convert to fraction form
   686,572/1,435,920 = 1,435,920/x
3. Step 3: Cross multiply
   686,572x = 1,435,920 × 1,435,920
4. Step 4: Simplify right side
   686,572x = 2,061,866,246,400
5. Step 5: Solve for x
   x = 2,061,866,246,400/686,572
6. Step 6: Final answer
   x = 3,003,131.86