Finding the Third Proportional to 402,408 and 852,793.31

Step by Step Solution

1. Step 1: Write the proportion equation
   402,408 : 852,793.31 = 852,793.31 : x
2. Step 2: Convert to fraction form
   402,408/852,793.31 = 852,793.31/x
3. Step 3: Cross multiply
   402,408x = 852,793.31 × 852,793.31
4. Step 4: Simplify right side
   402,408x = 727,256,433,844.72
5. Step 5: Solve for x
   x = 727,256,433,844.72/402,408
6. Step 6: Final answer
   x = 1,807,261.37