Finding the Fourth Proportional to 2,663.38, 3,992.10 and 1,427.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.38 : 3,992.10 = 1,427.68 : x
2. Step 2: Convert to fraction form
   2,663.38/3,992.10 = 1,427.68/x
3. Step 3: Cross multiply
   2,663.38x = 3,992.10 × 1,427.68
4. Step 4: Simplify right side
   2,663.38x = 5,699,441.33
5. Step 5: Solve for x
   x = 5,699,441.33/2,663.38
6. Step 6: Final answer
   x = 2,139.93