Finding the Fourth Proportional to 14,443.61, 19,928.76 and 8,390.25

Step by Step Solution

1. Step 1: Write the proportion equation
   14,443.61 : 19,928.76 = 8,390.25 : x
2. Step 2: Convert to fraction form
   14,443.61/19,928.76 = 8,390.25/x
3. Step 3: Cross multiply
   14,443.61x = 19,928.76 × 8,390.25
4. Step 4: Simplify right side
   14,443.61x = 167,207,278.59
5. Step 5: Solve for x
   x = 167,207,278.59/14,443.61
6. Step 6: Final answer
   x = 11,576.56