Finding the Fourth Proportional to 15,869.98, 21,901.22 and 8,796.25

Step by Step Solution

1. Step 1: Write the proportion equation
   15,869.98 : 21,901.22 = 8,796.25 : x
2. Step 2: Convert to fraction form
   15,869.98/21,901.22 = 8,796.25/x
3. Step 3: Cross multiply
   15,869.98x = 21,901.22 × 8,796.25
4. Step 4: Simplify right side
   15,869.98x = 192,648,606.43
5. Step 5: Solve for x
   x = 192,648,606.43/15,869.98
6. Step 6: Final answer
   x = 12,139.18