Finding the Fourth Proportional to 12,995.12, 17,928.60 and 7,402.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,995.12 : 17,928.60 = 7,402.88 : x
2. Step 2: Convert to fraction form
   12,995.12/17,928.60 = 7,402.88/x
3. Step 3: Cross multiply
   12,995.12x = 17,928.60 × 7,402.88
4. Step 4: Simplify right side
   12,995.12x = 132,723,274.37
5. Step 5: Solve for x
   x = 132,723,274.37/12,995.12
6. Step 6: Final answer
   x = 10,213.32