Finding the Fourth Proportional to 13,105.31, 18,082.22 and 7,438.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.31 : 18,082.22 = 7,438.82 : x
2. Step 2: Convert to fraction form
   13,105.31/18,082.22 = 7,438.82/x
3. Step 3: Cross multiply
   13,105.31x = 18,082.22 × 7,438.82
4. Step 4: Simplify right side
   13,105.31x = 134,510,379.78
5. Step 5: Solve for x
   x = 134,510,379.78/13,105.31
6. Step 6: Final answer
   x = 10,263.81