Finding the Fourth Proportional to 11,458.85, 17,178.56 and 5,216.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,458.85 : 17,178.56 = 5,216.69 : x
2. Step 2: Convert to fraction form
   11,458.85/17,178.56 = 5,216.69/x
3. Step 3: Cross multiply
   11,458.85x = 17,178.56 × 5,216.69
4. Step 4: Simplify right side
   11,458.85x = 89,615,110.19
5. Step 5: Solve for x
   x = 89,615,110.19/11,458.85
6. Step 6: Final answer
   x = 7,820.61