Finding the Fourth Proportional to 17,877.82, 24,671.39 and 9,920.10

Step by Step Solution

1. Step 1: Write the proportion equation
   17,877.82 : 24,671.39 = 9,920.10 : x
2. Step 2: Convert to fraction form
   17,877.82/24,671.39 = 9,920.10/x
3. Step 3: Cross multiply
   17,877.82x = 24,671.39 × 9,920.10
4. Step 4: Simplify right side
   17,877.82x = 244,742,655.94
5. Step 5: Solve for x
   x = 244,742,655.94/17,877.82
6. Step 6: Final answer
   x = 13,689.74