Finding the Third Proportional to 402,522 and 861,406

Step by Step Solution

1. Step 1: Write the proportion equation
   402,522 : 861,406 = 861,406 : x
2. Step 2: Convert to fraction form
   402,522/861,406 = 861,406/x
3. Step 3: Cross multiply
   402,522x = 861,406 × 861,406
4. Step 4: Simplify right side
   402,522x = 742,020,296,836
5. Step 5: Solve for x
   x = 742,020,296,836/402,522
6. Step 6: Final answer
   x = 1,843,427.93