Finding the Fourth Proportional to 15,615.40, 21,549.76 and 8,541.82

Step by Step Solution

1. Step 1: Write the proportion equation
   15,615.40 : 21,549.76 = 8,541.82 : x
2. Step 2: Convert to fraction form
   15,615.40/21,549.76 = 8,541.82/x
3. Step 3: Cross multiply
   15,615.40x = 21,549.76 × 8,541.82
4. Step 4: Simplify right side
   15,615.40x = 184,074,170.96
5. Step 5: Solve for x
   x = 184,074,170.96/15,615.40
6. Step 6: Final answer
   x = 11,787.99