Finding the Fourth Proportional to 11,618.56, 17,418.04 and 5,039.79

Step by Step Solution

1. Step 1: Write the proportion equation
   11,618.56 : 17,418.04 = 5,039.79 : x
2. Step 2: Convert to fraction form
   11,618.56/17,418.04 = 5,039.79/x
3. Step 3: Cross multiply
   11,618.56x = 17,418.04 × 5,039.79
4. Step 4: Simplify right side
   11,618.56x = 87,783,263.81
5. Step 5: Solve for x
   x = 87,783,263.81/11,618.56
6. Step 6: Final answer
   x = 7,555.43