Finding the Third Proportional to 158,617 and 245,978

Step by Step Solution

1. Step 1: Write the proportion equation
   158,617 : 245,978 = 245,978 : x
2. Step 2: Convert to fraction form
   158,617/245,978 = 245,978/x
3. Step 3: Cross multiply
   158,617x = 245,978 × 245,978
4. Step 4: Simplify right side
   158,617x = 60,505,176,484
5. Step 5: Solve for x
   x = 60,505,176,484/158,617
6. Step 6: Final answer
   x = 381,454.55