Finding the Fourth Proportional to 6,111.72, 9,160.38 and 2,821.80

Step by Step Solution

1. Step 1: Write the proportion equation
   6,111.72 : 9,160.38 = 2,821.80 : x
2. Step 2: Convert to fraction form
   6,111.72/9,160.38 = 2,821.80/x
3. Step 3: Cross multiply
   6,111.72x = 9,160.38 × 2,821.80
4. Step 4: Simplify right side
   6,111.72x = 25,848,760.28
5. Step 5: Solve for x
   x = 25,848,760.28/6,111.72
6. Step 6: Final answer
   x = 4,229.38