Finding the Fourth Proportional to 12,031.28, 18,050.56 and 5,455.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,031.28 : 18,050.56 = 5,455.72 : x
2. Step 2: Convert to fraction form
   12,031.28/18,050.56 = 5,455.72/x
3. Step 3: Cross multiply
   12,031.28x = 18,050.56 × 5,455.72
4. Step 4: Simplify right side
   12,031.28x = 98,478,801.20
5. Step 5: Solve for x
   x = 98,478,801.20/12,031.28
6. Step 6: Final answer
   x = 8,185.23