Finding the Fourth Proportional to 13,856.72, 19,122.33 and 7,569.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,856.72 : 19,122.33 = 7,569.09 : x
2. Step 2: Convert to fraction form
   13,856.72/19,122.33 = 7,569.09/x
3. Step 3: Cross multiply
   13,856.72x = 19,122.33 × 7,569.09
4. Step 4: Simplify right side
   13,856.72x = 144,738,636.78
5. Step 5: Solve for x
   x = 144,738,636.78/13,856.72
6. Step 6: Final answer
   x = 10,445.38