Finding the Third Proportional to 399,525.50 and 858,342

Step by Step Solution

1. Step 1: Write the proportion equation
   399,525.50 : 858,342 = 858,342 : x
2. Step 2: Convert to fraction form
   399,525.50/858,342 = 858,342/x
3. Step 3: Cross multiply
   399,525.50x = 858,342 × 858,342
4. Step 4: Simplify right side
   399,525.50x = 736,750,988,964
5. Step 5: Solve for x
   x = 736,750,988,964/399,525.50
6. Step 6: Final answer
   x = 1,844,064.99