Finding the Fourth Proportional to 12,018.69, 18,024.80 and 5,438.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,018.69 : 18,024.80 = 5,438.25 : x
2. Step 2: Convert to fraction form
   12,018.69/18,024.80 = 5,438.25/x
3. Step 3: Cross multiply
   12,018.69x = 18,024.80 × 5,438.25
4. Step 4: Simplify right side
   12,018.69x = 98,023,341.41
5. Step 5: Solve for x
   x = 98,023,341.41/12,018.69
6. Step 6: Final answer
   x = 8,155.91