Finding the Fourth Proportional to 10,191.72, 15,291 and 3,616.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,191.72 : 15,291 = 3,616.50 : x
2. Step 2: Convert to fraction form
   10,191.72/15,291 = 3,616.50/x
3. Step 3: Cross multiply
   10,191.72x = 15,291 × 3,616.50
4. Step 4: Simplify right side
   10,191.72x = 55,299,901.50
5. Step 5: Solve for x
   x = 55,299,901.50/10,191.72
6. Step 6: Final answer
   x = 5,425.96