Finding the Fourth Proportional to 15,856.84, 21,885.15 and 9,141.27

Step by Step Solution

1. Step 1: Write the proportion equation
   15,856.84 : 21,885.15 = 9,141.27 : x
2. Step 2: Convert to fraction form
   15,856.84/21,885.15 = 9,141.27/x
3. Step 3: Cross multiply
   15,856.84x = 21,885.15 × 9,141.27
4. Step 4: Simplify right side
   15,856.84x = 200,058,065.14
5. Step 5: Solve for x
   x = 200,058,065.14/15,856.84
6. Step 6: Final answer
   x = 12,616.52