Finding the Fourth Proportional to 10,958.78, 16,418.72 and 7,479.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,958.78 : 16,418.72 = 7,479.02 : x
2. Step 2: Convert to fraction form
   10,958.78/16,418.72 = 7,479.02/x
3. Step 3: Cross multiply
   10,958.78x = 16,418.72 × 7,479.02
4. Step 4: Simplify right side
   10,958.78x = 122,795,815.77
5. Step 5: Solve for x
   x = 122,795,815.77/10,958.78
6. Step 6: Final answer
   x = 11,205.25