Finding the Third Proportional to 689,428 and 1,441,320

Step by Step Solution

1. Step 1: Write the proportion equation
   689,428 : 1,441,320 = 1,441,320 : x
2. Step 2: Convert to fraction form
   689,428/1,441,320 = 1,441,320/x
3. Step 3: Cross multiply
   689,428x = 1,441,320 × 1,441,320
4. Step 4: Simplify right side
   689,428x = 2,077,403,342,400
5. Step 5: Solve for x
   x = 2,077,403,342,400/689,428
6. Step 6: Final answer
   x = 3,013,227.40