Finding the Fourth Proportional to 12,174.81, 16,801.46 and 7,142.66

Step by Step Solution

1. Step 1: Write the proportion equation
   12,174.81 : 16,801.46 = 7,142.66 : x
2. Step 2: Convert to fraction form
   12,174.81/16,801.46 = 7,142.66/x
3. Step 3: Cross multiply
   12,174.81x = 16,801.46 × 7,142.66
4. Step 4: Simplify right side
   12,174.81x = 120,006,996.56
5. Step 5: Solve for x
   x = 120,006,996.56/12,174.81
6. Step 6: Final answer
   x = 9,856.99