Finding the Fourth Proportional to 17,878.59, 24,671.35 and 9,921.34

Step by Step Solution

1. Step 1: Write the proportion equation
   17,878.59 : 24,671.35 = 9,921.34 : x
2. Step 2: Convert to fraction form
   17,878.59/24,671.35 = 9,921.34/x
3. Step 3: Cross multiply
   17,878.59x = 24,671.35 × 9,921.34
4. Step 4: Simplify right side
   17,878.59x = 244,772,756.07
5. Step 5: Solve for x
   x = 244,772,756.07/17,878.59
6. Step 6: Final answer
   x = 13,690.83