Finding the Fourth Proportional to 15,877.86, 21,914.30 and 9,162.55

Step by Step Solution

1. Step 1: Write the proportion equation
   15,877.86 : 21,914.30 = 9,162.55 : x
2. Step 2: Convert to fraction form
   15,877.86/21,914.30 = 9,162.55/x
3. Step 3: Cross multiply
   15,877.86x = 21,914.30 × 9,162.55
4. Step 4: Simplify right side
   15,877.86x = 200,790,868.22
5. Step 5: Solve for x
   x = 200,790,868.22/15,877.86
6. Step 6: Final answer
   x = 12,645.97