Finding the Fourth Proportional to 13,185.76, 19,788.72 and 9,724

Step by Step Solution

1. Step 1: Write the proportion equation
   13,185.76 : 19,788.72 = 9,724 : x
2. Step 2: Convert to fraction form
   13,185.76/19,788.72 = 9,724/x
3. Step 3: Cross multiply
   13,185.76x = 19,788.72 × 9,724
4. Step 4: Simplify right side
   13,185.76x = 192,425,513.28
5. Step 5: Solve for x
   x = 192,425,513.28/13,185.76
6. Step 6: Final answer
   x = 14,593.43