Finding the Third Proportional to 639,981 and 1,374,853.50

Step by Step Solution

1. Step 1: Write the proportion equation
   639,981 : 1,374,853.50 = 1,374,853.50 : x
2. Step 2: Convert to fraction form
   639,981/1,374,853.50 = 1,374,853.50/x
3. Step 3: Cross multiply
   639,981x = 1,374,853.50 × 1,374,853.50
4. Step 4: Simplify right side
   639,981x = 1,890,222,146,462.25
5. Step 5: Solve for x
   x = 1,890,222,146,462.25/639,981
6. Step 6: Final answer
   x = 2,953,559.79