Finding the Fourth Proportional to 11,429.57, 17,144.93 and 3,638.99

Step by Step Solution

1. Step 1: Write the proportion equation
   11,429.57 : 17,144.93 = 3,638.99 : x
2. Step 2: Convert to fraction form
   11,429.57/17,144.93 = 3,638.99/x
3. Step 3: Cross multiply
   11,429.57x = 17,144.93 × 3,638.99
4. Step 4: Simplify right side
   11,429.57x = 62,390,280.78
5. Step 5: Solve for x
   x = 62,390,280.78/11,429.57
6. Step 6: Final answer
   x = 5,458.67