Finding the Fourth Proportional to 11,640.56, 17,463.76 and 3,320.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,640.56 : 17,463.76 = 3,320.56 : x
2. Step 2: Convert to fraction form
   11,640.56/17,463.76 = 3,320.56/x
3. Step 3: Cross multiply
   11,640.56x = 17,463.76 × 3,320.56
4. Step 4: Simplify right side
   11,640.56x = 57,989,462.91
5. Step 5: Solve for x
   x = 57,989,462.91/11,640.56
6. Step 6: Final answer
   x = 4,981.67