Finding the Fourth Proportional to 11,758.91, 17,640.05 and 3,439.53

Step by Step Solution

1. Step 1: Write the proportion equation
   11,758.91 : 17,640.05 = 3,439.53 : x
2. Step 2: Convert to fraction form
   11,758.91/17,640.05 = 3,439.53/x
3. Step 3: Cross multiply
   11,758.91x = 17,640.05 × 3,439.53
4. Step 4: Simplify right side
   11,758.91x = 60,673,463.98
5. Step 5: Solve for x
   x = 60,673,463.98/11,758.91
6. Step 6: Final answer
   x = 5,159.79