Finding the Third Proportional to 686,570 and 1,435,916

Step by Step Solution

1. Step 1: Write the proportion equation
   686,570 : 1,435,916 = 1,435,916 : x
2. Step 2: Convert to fraction form
   686,570/1,435,916 = 1,435,916/x
3. Step 3: Cross multiply
   686,570x = 1,435,916 × 1,435,916
4. Step 4: Simplify right side
   686,570x = 2,061,854,759,056
5. Step 5: Solve for x
   x = 2,061,854,759,056/686,570
6. Step 6: Final answer
   x = 3,003,123.88