Finding the Third Proportional to 1,398,336 and 2,123,280

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398,336 : 2,123,280 = 2,123,280 : x
2. Step 2: Convert to fraction form
   1,398,336/2,123,280 = 2,123,280/x
3. Step 3: Cross multiply
   1,398,336x = 2,123,280 × 2,123,280
4. Step 4: Simplify right side
   1,398,336x = 4,508,317,958,400
5. Step 5: Solve for x
   x = 4,508,317,958,400/1,398,336
6. Step 6: Final answer
   x = 3,224,059.14