Finding the Fourth Proportional to 15,843.18, 21,843.72 and 10,167.90

Step by Step Solution

1. Step 1: Write the proportion equation
   15,843.18 : 21,843.72 = 10,167.90 : x
2. Step 2: Convert to fraction form
   15,843.18/21,843.72 = 10,167.90/x
3. Step 3: Cross multiply
   15,843.18x = 21,843.72 × 10,167.90
4. Step 4: Simplify right side
   15,843.18x = 222,104,760.59
5. Step 5: Solve for x
   x = 222,104,760.59/15,843.18
6. Step 6: Final answer
   x = 14,018.95