Finding the Fourth Proportional to 12,807.01, 17,673.74 and 7,142.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807.01 : 17,673.74 = 7,142.10 : x
2. Step 2: Convert to fraction form
   12,807.01/17,673.74 = 7,142.10/x
3. Step 3: Cross multiply
   12,807.01x = 17,673.74 × 7,142.10
4. Step 4: Simplify right side
   12,807.01x = 126,227,618.45
5. Step 5: Solve for x
   x = 126,227,618.45/12,807.01
6. Step 6: Final answer
   x = 9,856.13