Finding the Third Proportional to 399,521.50 and 858,333.50

Step by Step Solution

1. Step 1: Write the proportion equation
   399,521.50 : 858,333.50 = 858,333.50 : x
2. Step 2: Convert to fraction form
   399,521.50/858,333.50 = 858,333.50/x
3. Step 3: Cross multiply
   399,521.50x = 858,333.50 × 858,333.50
4. Step 4: Simplify right side
   399,521.50x = 736,736,397,222.25
5. Step 5: Solve for x
   x = 736,736,397,222.25/399,521.50
6. Step 6: Final answer
   x = 1,844,046.93