Finding the Fourth Proportional to 12,288.25, 18,438.38 and 5,719.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,288.25 : 18,438.38 = 5,719.01 : x
2. Step 2: Convert to fraction form
   12,288.25/18,438.38 = 5,719.01/x
3. Step 3: Cross multiply
   12,288.25x = 18,438.38 × 5,719.01
4. Step 4: Simplify right side
   12,288.25x = 105,449,251.01
5. Step 5: Solve for x
   x = 105,449,251.01/12,288.25
6. Step 6: Final answer
   x = 8,581.31