Finding the Third Proportional to 285,118.31 and 426,834.56

Step by Step Solution

1. Step 1: Write the proportion equation
   285,118.31 : 426,834.56 = 426,834.56 : x
2. Step 2: Convert to fraction form
   285,118.31/426,834.56 = 426,834.56/x
3. Step 3: Cross multiply
   285,118.31x = 426,834.56 × 426,834.56
4. Step 4: Simplify right side
   285,118.31x = 182,187,743,744.57
5. Step 5: Solve for x
   x = 182,187,743,744.57/285,118.31
6. Step 6: Final answer
   x = 638,989.98