Finding the Fourth Proportional to 5,388.72, 8,079.86 and 2,097.96

Step by Step Solution

1. Step 1: Write the proportion equation
   5,388.72 : 8,079.86 = 2,097.96 : x
2. Step 2: Convert to fraction form
   5,388.72/8,079.86 = 2,097.96/x
3. Step 3: Cross multiply
   5,388.72x = 8,079.86 × 2,097.96
4. Step 4: Simplify right side
   5,388.72x = 16,951,223.09
5. Step 5: Solve for x
   x = 16,951,223.09/5,388.72
6. Step 6: Final answer
   x = 3,145.69