Finding the Fourth Proportional to 11,155.58, 16,722.49 and 5,310.62

Step by Step Solution

1. Step 1: Write the proportion equation
   11,155.58 : 16,722.49 = 5,310.62 : x
2. Step 2: Convert to fraction form
   11,155.58/16,722.49 = 5,310.62/x
3. Step 3: Cross multiply
   11,155.58x = 16,722.49 × 5,310.62
4. Step 4: Simplify right side
   11,155.58x = 88,806,789.84
5. Step 5: Solve for x
   x = 88,806,789.84/11,155.58
6. Step 6: Final answer
   x = 7,960.75