Finding the Fourth Proportional to 3,919.32, 5,879.33 and 997.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.32 : 5,879.33 = 997.63 : x
2. Step 2: Convert to fraction form
   3,919.32/5,879.33 = 997.63/x
3. Step 3: Cross multiply
   3,919.32x = 5,879.33 × 997.63
4. Step 4: Simplify right side
   3,919.32x = 5,865,387.61
5. Step 5: Solve for x
   x = 5,865,387.61/3,919.32
6. Step 6: Final answer
   x = 1,496.53