Finding the Fourth Proportional to 21,842.55, 30,102.72 and 15,863.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,842.55 : 30,102.72 = 15,863.82 : x
2. Step 2: Convert to fraction form
   21,842.55/30,102.72 = 15,863.82/x
3. Step 3: Cross multiply
   21,842.55x = 30,102.72 × 15,863.82
4. Step 4: Simplify right side
   21,842.55x = 477,544,131.59
5. Step 5: Solve for x
   x = 477,544,131.59/21,842.55
6. Step 6: Final answer
   x = 21,863.02