Finding the Fourth Proportional to 8,961.72, 13,444.20 and 3,696.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,961.72 : 13,444.20 = 3,696.72 : x
2. Step 2: Convert to fraction form
   8,961.72/13,444.20 = 3,696.72/x
3. Step 3: Cross multiply
   8,961.72x = 13,444.20 × 3,696.72
4. Step 4: Simplify right side
   8,961.72x = 49,699,443.02
5. Step 5: Solve for x
   x = 49,699,443.02/8,961.72
6. Step 6: Final answer
   x = 5,545.75