Finding the Third Proportional to 642,324 and 1,399,040

Step by Step Solution

1. Step 1: Write the proportion equation
   642,324 : 1,399,040 = 1,399,040 : x
2. Step 2: Convert to fraction form
   642,324/1,399,040 = 1,399,040/x
3. Step 3: Cross multiply
   642,324x = 1,399,040 × 1,399,040
4. Step 4: Simplify right side
   642,324x = 1,957,312,921,600
5. Step 5: Solve for x
   x = 1,957,312,921,600/642,324
6. Step 6: Final answer
   x = 3,047,236.16