Finding the Fourth Proportional to 14,217.56, 19,619.52 and 7,928.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,217.56 : 19,619.52 = 7,928.72 : x
2. Step 2: Convert to fraction form
   14,217.56/19,619.52 = 7,928.72/x
3. Step 3: Cross multiply
   14,217.56x = 19,619.52 × 7,928.72
4. Step 4: Simplify right side
   14,217.56x = 155,557,680.61
5. Step 5: Solve for x
   x = 155,557,680.61/14,217.56
6. Step 6: Final answer
   x = 10,941.24