Finding the Fourth Proportional to 12,978.52, 19,464.19 and 5,581.41

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978.52 : 19,464.19 = 5,581.41 : x
2. Step 2: Convert to fraction form
   12,978.52/19,464.19 = 5,581.41/x
3. Step 3: Cross multiply
   12,978.52x = 19,464.19 × 5,581.41
4. Step 4: Simplify right side
   12,978.52x = 108,637,624.71
5. Step 5: Solve for x
   x = 108,637,624.71/12,978.52
6. Step 6: Final answer
   x = 8,370.57