Finding the Third Proportional to 417,216.50 and 856,550

Step by Step Solution

1. Step 1: Write the proportion equation
   417,216.50 : 856,550 = 856,550 : x
2. Step 2: Convert to fraction form
   417,216.50/856,550 = 856,550/x
3. Step 3: Cross multiply
   417,216.50x = 856,550 × 856,550
4. Step 4: Simplify right side
   417,216.50x = 733,677,902,500
5. Step 5: Solve for x
   x = 733,677,902,500/417,216.50
6. Step 6: Final answer
   x = 1,758,506.44