Finding the Fourth Proportional to 17,878.53, 24,672.41 and 9,920.77

Step by Step Solution

1. Step 1: Write the proportion equation
   17,878.53 : 24,672.41 = 9,920.77 : x
2. Step 2: Convert to fraction form
   17,878.53/24,672.41 = 9,920.77/x
3. Step 3: Cross multiply
   17,878.53x = 24,672.41 × 9,920.77
4. Step 4: Simplify right side
   17,878.53x = 244,769,255.35
5. Step 5: Solve for x
   x = 244,769,255.35/17,878.53
6. Step 6: Final answer
   x = 13,690.69