Finding the Fourth Proportional to 5,488.72, 8,233.20 and 2,156.80

Step by Step Solution

1. Step 1: Write the proportion equation
   5,488.72 : 8,233.20 = 2,156.80 : x
2. Step 2: Convert to fraction form
   5,488.72/8,233.20 = 2,156.80/x
3. Step 3: Cross multiply
   5,488.72x = 8,233.20 × 2,156.80
4. Step 4: Simplify right side
   5,488.72x = 17,757,365.76
5. Step 5: Solve for x
   x = 17,757,365.76/5,488.72
6. Step 6: Final answer
   x = 3,235.25