Finding the Fourth Proportional to 12,020.63, 18,028.71 and 3,254.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,020.63 : 18,028.71 = 3,254.40 : x
2. Step 2: Convert to fraction form
   12,020.63/18,028.71 = 3,254.40/x
3. Step 3: Cross multiply
   12,020.63x = 18,028.71 × 3,254.40
4. Step 4: Simplify right side
   12,020.63x = 58,672,633.82
5. Step 5: Solve for x
   x = 58,672,633.82/12,020.63
6. Step 6: Final answer
   x = 4,881.00