Finding the Third Proportional to 399,345.75 and 868,662

Step by Step Solution

1. Step 1: Write the proportion equation
   399,345.75 : 868,662 = 868,662 : x
2. Step 2: Convert to fraction form
   399,345.75/868,662 = 868,662/x
3. Step 3: Cross multiply
   399,345.75x = 868,662 × 868,662
4. Step 4: Simplify right side
   399,345.75x = 754,573,670,244
5. Step 5: Solve for x
   x = 754,573,670,244/399,345.75
6. Step 6: Final answer
   x = 1,889,524.73