Finding the Fourth Proportional to 11,957.90, 17,937.58 and 3,638.53

Step by Step Solution

1. Step 1: Write the proportion equation
   11,957.90 : 17,937.58 = 3,638.53 : x
2. Step 2: Convert to fraction form
   11,957.90/17,937.58 = 3,638.53/x
3. Step 3: Cross multiply
   11,957.90x = 17,937.58 × 3,638.53
4. Step 4: Simplify right side
   11,957.90x = 65,266,382.42
5. Step 5: Solve for x
   x = 65,266,382.42/11,957.90
6. Step 6: Final answer
   x = 5,458.02