Finding the Fourth Proportional to 16,317.56, 22,496.42 and 12,971.48

Step by Step Solution

1. Step 1: Write the proportion equation
   16,317.56 : 22,496.42 = 12,971.48 : x
2. Step 2: Convert to fraction form
   16,317.56/22,496.42 = 12,971.48/x
3. Step 3: Cross multiply
   16,317.56x = 22,496.42 × 12,971.48
4. Step 4: Simplify right side
   16,317.56x = 291,811,862.10
5. Step 5: Solve for x
   x = 291,811,862.10/16,317.56
6. Step 6: Final answer
   x = 17,883.30