Finding the Fourth Proportional to 13,436.72, 18,541.33 and 7,771.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,436.72 : 18,541.33 = 7,771.04 : x
2. Step 2: Convert to fraction form
   13,436.72/18,541.33 = 7,771.04/x
3. Step 3: Cross multiply
   13,436.72x = 18,541.33 × 7,771.04
4. Step 4: Simplify right side
   13,436.72x = 144,085,285.52
5. Step 5: Solve for x
   x = 144,085,285.52/13,436.72
6. Step 6: Final answer
   x = 10,723.25