Finding the Third Proportional to 1,398,318 and 2,159,295

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398,318 : 2,159,295 = 2,159,295 : x
2. Step 2: Convert to fraction form
   1,398,318/2,159,295 = 2,159,295/x
3. Step 3: Cross multiply
   1,398,318x = 2,159,295 × 2,159,295
4. Step 4: Simplify right side
   1,398,318x = 4,662,554,897,025
5. Step 5: Solve for x
   x = 4,662,554,897,025/1,398,318
6. Step 6: Final answer
   x = 3,334,402.40