Finding the Fourth Proportional to 5,561.38, 8,342.79 and 1,665.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,561.38 : 8,342.79 = 1,665.28 : x
2. Step 2: Convert to fraction form
   5,561.38/8,342.79 = 1,665.28/x
3. Step 3: Cross multiply
   5,561.38x = 8,342.79 × 1,665.28
4. Step 4: Simplify right side
   5,561.38x = 13,893,081.33
5. Step 5: Solve for x
   x = 13,893,081.33/5,561.38
6. Step 6: Final answer
   x = 2,498.14