Finding the Third Proportional to 202,812.75 and 318,140

Step by Step Solution

1. Step 1: Write the proportion equation
   202,812.75 : 318,140 = 318,140 : x
2. Step 2: Convert to fraction form
   202,812.75/318,140 = 318,140/x
3. Step 3: Cross multiply
   202,812.75x = 318,140 × 318,140
4. Step 4: Simplify right side
   202,812.75x = 101,213,059,600
5. Step 5: Solve for x
   x = 101,213,059,600/202,812.75
6. Step 6: Final answer
   x = 499,046.83