Finding the Fourth Proportional to 13,824.72, 20,743.31 and 7,501.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,824.72 : 20,743.31 = 7,501.57 : x
2. Step 2: Convert to fraction form
   13,824.72/20,743.31 = 7,501.57/x
3. Step 3: Cross multiply
   13,824.72x = 20,743.31 × 7,501.57
4. Step 4: Simplify right side
   13,824.72x = 155,607,358.89
5. Step 5: Solve for x
   x = 155,607,358.89/13,824.72
6. Step 6: Final answer
   x = 11,255.73