Finding the Fourth Proportional to 13,587.72, 18,742.42 and 9,816.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,587.72 : 18,742.42 = 9,816.42 : x
2. Step 2: Convert to fraction form
   13,587.72/18,742.42 = 9,816.42/x
3. Step 3: Cross multiply
   13,587.72x = 18,742.42 × 9,816.42
4. Step 4: Simplify right side
   13,587.72x = 183,983,466.54
5. Step 5: Solve for x
   x = 183,983,466.54/13,587.72
6. Step 6: Final answer
   x = 13,540.42