Finding the Fourth Proportional to 13,225.59, 19,825.43 and 5,439.87

Step by Step Solution

1. Step 1: Write the proportion equation
   13,225.59 : 19,825.43 = 5,439.87 : x
2. Step 2: Convert to fraction form
   13,225.59/19,825.43 = 5,439.87/x
3. Step 3: Cross multiply
   13,225.59x = 19,825.43 × 5,439.87
4. Step 4: Simplify right side
   13,225.59x = 107,847,734.69
5. Step 5: Solve for x
   x = 107,847,734.69/13,225.59
6. Step 6: Final answer
   x = 8,154.47