Finding the Fourth Proportional to 12,808.01, 17,675.12 and 7,143.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,808.01 : 17,675.12 = 7,143.10 : x
2. Step 2: Convert to fraction form
   12,808.01/17,675.12 = 7,143.10/x
3. Step 3: Cross multiply
   12,808.01x = 17,675.12 × 7,143.10
4. Step 4: Simplify right side
   12,808.01x = 126,255,149.67
5. Step 5: Solve for x
   x = 126,255,149.67/12,808.01
6. Step 6: Final answer
   x = 9,857.51