Finding the Fourth Proportional to 11,155.08, 16,721.74 and 5,310.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,155.08 : 16,721.74 = 5,310.12 : x
2. Step 2: Convert to fraction form
   11,155.08/16,721.74 = 5,310.12/x
3. Step 3: Cross multiply
   11,155.08x = 16,721.74 × 5,310.12
4. Step 4: Simplify right side
   11,155.08x = 88,794,446.01
5. Step 5: Solve for x
   x = 88,794,446.01/11,155.08
6. Step 6: Final answer
   x = 7,960.00