Finding the Fourth Proportional to 11,164.32, 16,722.84 and 5,315.04

Step by Step Solution

1. Step 1: Write the proportion equation
   11,164.32 : 16,722.84 = 5,315.04 : x
2. Step 2: Convert to fraction form
   11,164.32/16,722.84 = 5,315.04/x
3. Step 3: Cross multiply
   11,164.32x = 16,722.84 × 5,315.04
4. Step 4: Simplify right side
   11,164.32x = 88,882,563.51
5. Step 5: Solve for x
   x = 88,882,563.51/11,164.32
6. Step 6: Final answer
   x = 7,961.31