Finding the Fourth Proportional to 17,878.17, 24,672.15 and 9,920.73

Step by Step Solution

1. Step 1: Write the proportion equation
   17,878.17 : 24,672.15 = 9,920.73 : x
2. Step 2: Convert to fraction form
   17,878.17/24,672.15 = 9,920.73/x
3. Step 3: Cross multiply
   17,878.17x = 24,672.15 × 9,920.73
4. Step 4: Simplify right side
   17,878.17x = 244,765,738.67
5. Step 5: Solve for x
   x = 244,765,738.67/17,878.17
6. Step 6: Final answer
   x = 13,690.76