Finding the Fourth Proportional to 12,997.12, 19,442.16 and 10,808.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,997.12 : 19,442.16 = 10,808.80 : x
2. Step 2: Convert to fraction form
   12,997.12/19,442.16 = 10,808.80/x
3. Step 3: Cross multiply
   12,997.12x = 19,442.16 × 10,808.80
4. Step 4: Simplify right side
   12,997.12x = 210,146,419.01
5. Step 5: Solve for x
   x = 210,146,419.01/12,997.12
6. Step 6: Final answer
   x = 16,168.69