Finding the Fourth Proportional to 12,928.72, 17,822.82 and 10,277.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,928.72 : 17,822.82 = 10,277.20 : x
2. Step 2: Convert to fraction form
   12,928.72/17,822.82 = 10,277.20/x
3. Step 3: Cross multiply
   12,928.72x = 17,822.82 × 10,277.20
4. Step 4: Simplify right side
   12,928.72x = 183,168,685.70
5. Step 5: Solve for x
   x = 183,168,685.70/12,928.72
6. Step 6: Final answer
   x = 14,167.58