Finding the Third Proportional to 202,860 and 315,352.75

Step by Step Solution

1. Step 1: Write the proportion equation
   202,860 : 315,352.75 = 315,352.75 : x
2. Step 2: Convert to fraction form
   202,860/315,352.75 = 315,352.75/x
3. Step 3: Cross multiply
   202,860x = 315,352.75 × 315,352.75
4. Step 4: Simplify right side
   202,860x = 99,447,356,932.56
5. Step 5: Solve for x
   x = 99,447,356,932.56/202,860
6. Step 6: Final answer
   x = 490,226.55