Finding the Third Proportional to 399,697.50 and 856,373.25

Step by Step Solution

1. Step 1: Write the proportion equation
   399,697.50 : 856,373.25 = 856,373.25 : x
2. Step 2: Convert to fraction form
   399,697.50/856,373.25 = 856,373.25/x
3. Step 3: Cross multiply
   399,697.50x = 856,373.25 × 856,373.25
4. Step 4: Simplify right side
   399,697.50x = 733,375,143,315.56
5. Step 5: Solve for x
   x = 733,375,143,315.56/399,697.50
6. Step 6: Final answer
   x = 1,834,825.45