Finding the Fourth Proportional to 13,059.29, 18,019.91 and 7,469.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,059.29 : 18,019.91 = 7,469.21 : x
2. Step 2: Convert to fraction form
   13,059.29/18,019.91 = 7,469.21/x
3. Step 3: Cross multiply
   13,059.29x = 18,019.91 × 7,469.21
4. Step 4: Simplify right side
   13,059.29x = 134,594,364.53
5. Step 5: Solve for x
   x = 134,594,364.53/13,059.29
6. Step 6: Final answer
   x = 10,306.41