Finding the Fourth Proportional to 13,155.34, 19,721.90 and 5,754.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,155.34 : 19,721.90 = 5,754.18 : x
2. Step 2: Convert to fraction form
   13,155.34/19,721.90 = 5,754.18/x
3. Step 3: Cross multiply
   13,155.34x = 19,721.90 × 5,754.18
4. Step 4: Simplify right side
   13,155.34x = 113,483,362.54
5. Step 5: Solve for x
   x = 113,483,362.54/13,155.34
6. Step 6: Final answer
   x = 8,626.41