Finding the Third Proportional to 643,970 and 1,398,592

Step by Step Solution

1. Step 1: Write the proportion equation
   643,970 : 1,398,592 = 1,398,592 : x
2. Step 2: Convert to fraction form
   643,970/1,398,592 = 1,398,592/x
3. Step 3: Cross multiply
   643,970x = 1,398,592 × 1,398,592
4. Step 4: Simplify right side
   643,970x = 1,956,059,582,464
5. Step 5: Solve for x
   x = 1,956,059,582,464/643,970
6. Step 6: Final answer
   x = 3,037,501.10