Finding the Third Proportional to 215,883 and 323,851.50

Step by Step Solution

1. Step 1: Write the proportion equation
   215,883 : 323,851.50 = 323,851.50 : x
2. Step 2: Convert to fraction form
   215,883/323,851.50 = 323,851.50/x
3. Step 3: Cross multiply
   215,883x = 323,851.50 × 323,851.50
4. Step 4: Simplify right side
   215,883x = 104,879,794,052.25
5. Step 5: Solve for x
   x = 104,879,794,052.25/215,883
6. Step 6: Final answer
   x = 485,817.75