Finding the Fourth Proportional to 13,142.01, 18,137.51 and 7,321.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,142.01 : 18,137.51 = 7,321.71 : x
2. Step 2: Convert to fraction form
   13,142.01/18,137.51 = 7,321.71/x
3. Step 3: Cross multiply
   13,142.01x = 18,137.51 × 7,321.71
4. Step 4: Simplify right side
   13,142.01x = 132,797,588.34
5. Step 5: Solve for x
   x = 132,797,588.34/13,142.01
6. Step 6: Final answer
   x = 10,104.82