Finding the Fourth Proportional to 11,638.50, 17,458.77 and 3,318.33

Step by Step Solution

1. Step 1: Write the proportion equation
   11,638.50 : 17,458.77 = 3,318.33 : x
2. Step 2: Convert to fraction form
   11,638.50/17,458.77 = 3,318.33/x
3. Step 3: Cross multiply
   11,638.50x = 17,458.77 × 3,318.33
4. Step 4: Simplify right side
   11,638.50x = 57,934,038.17
5. Step 5: Solve for x
   x = 57,934,038.17/11,638.50
6. Step 6: Final answer
   x = 4,977.79