Finding the Third Proportional to 206,377.88 and 318,978

Step by Step Solution

1. Step 1: Write the proportion equation
   206,377.88 : 318,978 = 318,978 : x
2. Step 2: Convert to fraction form
   206,377.88/318,978 = 318,978/x
3. Step 3: Cross multiply
   206,377.88x = 318,978 × 318,978
4. Step 4: Simplify right side
   206,377.88x = 101,746,964,484
5. Step 5: Solve for x
   x = 101,746,964,484/206,377.88
6. Step 6: Final answer
   x = 493,012.95