Finding the Fourth Proportional to 11,618.39, 17,417.78 and 5,039.62

Step by Step Solution

1. Step 1: Write the proportion equation
   11,618.39 : 17,417.78 = 5,039.62 : x
2. Step 2: Convert to fraction form
   11,618.39/17,417.78 = 5,039.62/x
3. Step 3: Cross multiply
   11,618.39x = 17,417.78 × 5,039.62
4. Step 4: Simplify right side
   11,618.39x = 87,778,961.50
5. Step 5: Solve for x
   x = 87,778,961.50/11,618.39
6. Step 6: Final answer
   x = 7,555.17