Finding the Fourth Proportional to 12,022.56, 18,026.28 and 7,857.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,022.56 : 18,026.28 = 7,857.54 : x
2. Step 2: Convert to fraction form
   12,022.56/18,026.28 = 7,857.54/x
3. Step 3: Cross multiply
   12,022.56x = 18,026.28 × 7,857.54
4. Step 4: Simplify right side
   12,022.56x = 141,642,216.15
5. Step 5: Solve for x
   x = 141,642,216.15/12,022.56
6. Step 6: Final answer
   x = 11,781.37