Finding the Fourth Proportional to 12,807.33, 17,674.16 and 7,142.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807.33 : 17,674.16 = 7,142.05 : x
2. Step 2: Convert to fraction form
   12,807.33/17,674.16 = 7,142.05/x
3. Step 3: Cross multiply
   12,807.33x = 17,674.16 × 7,142.05
4. Step 4: Simplify right side
   12,807.33x = 126,229,734.43
5. Step 5: Solve for x
   x = 126,229,734.43/12,807.33
6. Step 6: Final answer
   x = 9,856.05