Finding the Fourth Proportional to 11,429.60, 17,145.68 and 3,636.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,429.60 : 17,145.68 = 3,636.60 : x
2. Step 2: Convert to fraction form
   11,429.60/17,145.68 = 3,636.60/x
3. Step 3: Cross multiply
   11,429.60x = 17,145.68 × 3,636.60
4. Step 4: Simplify right side
   11,429.60x = 62,351,979.89
5. Step 5: Solve for x
   x = 62,351,979.89/11,429.60
6. Step 6: Final answer
   x = 5,455.31