Finding the Fourth Proportional to 12,462.72, 17,199.36 and 7,157.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,462.72 : 17,199.36 = 7,157.76 : x
2. Step 2: Convert to fraction form
   12,462.72/17,199.36 = 7,157.76/x
3. Step 3: Cross multiply
   12,462.72x = 17,199.36 × 7,157.76
4. Step 4: Simplify right side
   12,462.72x = 123,108,891.03
5. Step 5: Solve for x
   x = 123,108,891.03/12,462.72
6. Step 6: Final answer
   x = 9,878.17