Finding the Third Proportional to 639,353.25 and 1,399,113

Step by Step Solution

1. Step 1: Write the proportion equation
   639,353.25 : 1,399,113 = 1,399,113 : x
2. Step 2: Convert to fraction form
   639,353.25/1,399,113 = 1,399,113/x
3. Step 3: Cross multiply
   639,353.25x = 1,399,113 × 1,399,113
4. Step 4: Simplify right side
   639,353.25x = 1,957,517,186,769
5. Step 5: Solve for x
   x = 1,957,517,186,769/639,353.25
6. Step 6: Final answer
   x = 3,061,714.61