Finding the Fourth Proportional to 12,921.37, 17,826.83 and 7,329.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,921.37 : 17,826.83 = 7,329.13 : x
2. Step 2: Convert to fraction form
   12,921.37/17,826.83 = 7,329.13/x
3. Step 3: Cross multiply
   12,921.37x = 17,826.83 × 7,329.13
4. Step 4: Simplify right side
   12,921.37x = 130,655,117.91
5. Step 5: Solve for x
   x = 130,655,117.91/12,921.37
6. Step 6: Final answer
   x = 10,111.55