Finding the Fourth Proportional to 11,238.72, 16,859.91 and 4,219.29

Step by Step Solution

1. Step 1: Write the proportion equation
   11,238.72 : 16,859.91 = 4,219.29 : x
2. Step 2: Convert to fraction form
   11,238.72/16,859.91 = 4,219.29/x
3. Step 3: Cross multiply
   11,238.72x = 16,859.91 × 4,219.29
4. Step 4: Simplify right side
   11,238.72x = 71,136,744.27
5. Step 5: Solve for x
   x = 71,136,744.27/11,238.72
6. Step 6: Final answer
   x = 6,329.61