Finding the Fourth Proportional to 9,162.78, 13,748.15 and 3,620.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,162.78 : 13,748.15 = 3,620.17 : x
2. Step 2: Convert to fraction form
   9,162.78/13,748.15 = 3,620.17/x
3. Step 3: Cross multiply
   9,162.78x = 13,748.15 × 3,620.17
4. Step 4: Simplify right side
   9,162.78x = 49,770,640.19
5. Step 5: Solve for x
   x = 49,770,640.19/9,162.78
6. Step 6: Final answer
   x = 5,431.83