Finding the Third Proportional to 215,850 and 326,785.50

Step by Step Solution

1. Step 1: Write the proportion equation
   215,850 : 326,785.50 = 326,785.50 : x
2. Step 2: Convert to fraction form
   215,850/326,785.50 = 326,785.50/x
3. Step 3: Cross multiply
   215,850x = 326,785.50 × 326,785.50
4. Step 4: Simplify right side
   215,850x = 106,788,763,010.25
5. Step 5: Solve for x
   x = 106,788,763,010.25/215,850
6. Step 6: Final answer
   x = 494,735.99