Finding the Fourth Proportional to 12,921.46, 17,830.22 and 7,256.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,921.46 : 17,830.22 = 7,256.82 : x
2. Step 2: Convert to fraction form
   12,921.46/17,830.22 = 7,256.82/x
3. Step 3: Cross multiply
   12,921.46x = 17,830.22 × 7,256.82
4. Step 4: Simplify right side
   12,921.46x = 129,390,697.10
5. Step 5: Solve for x
   x = 129,390,697.10/12,921.46
6. Step 6: Final answer
   x = 10,013.63