Finding the Fourth Proportional to 12,808.01, 17,675.16 and 7,143.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,808.01 : 17,675.16 = 7,143.12 : x
2. Step 2: Convert to fraction form
   12,808.01/17,675.16 = 7,143.12/x
3. Step 3: Cross multiply
   12,808.01x = 17,675.16 × 7,143.12
4. Step 4: Simplify right side
   12,808.01x = 126,255,788.90
5. Step 5: Solve for x
   x = 126,255,788.90/12,808.01
6. Step 6: Final answer
   x = 9,857.56