Finding the Third Proportional to 399,757.50 and 858,807

Step by Step Solution

1. Step 1: Write the proportion equation
   399,757.50 : 858,807 = 858,807 : x
2. Step 2: Convert to fraction form
   399,757.50/858,807 = 858,807/x
3. Step 3: Cross multiply
   399,757.50x = 858,807 × 858,807
4. Step 4: Simplify right side
   399,757.50x = 737,549,463,249
5. Step 5: Solve for x
   x = 737,549,463,249/399,757.50
6. Step 6: Final answer
   x = 1,844,992.18