Finding the Fourth Proportional to 13,229.18, 18,256.79 and 7,261.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,229.18 : 18,256.79 = 7,261.05 : x
2. Step 2: Convert to fraction form
   13,229.18/18,256.79 = 7,261.05/x
3. Step 3: Cross multiply
   13,229.18x = 18,256.79 × 7,261.05
4. Step 4: Simplify right side
   13,229.18x = 132,563,428.72
5. Step 5: Solve for x
   x = 132,563,428.72/13,229.18
6. Step 6: Final answer
   x = 10,020.54