Finding the Fourth Proportional to 2,663.48, 3,998.02 and 1,277.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.48 : 3,998.02 = 1,277.98 : x
2. Step 2: Convert to fraction form
   2,663.48/3,998.02 = 1,277.98/x
3. Step 3: Cross multiply
   2,663.48x = 3,998.02 × 1,277.98
4. Step 4: Simplify right side
   2,663.48x = 5,109,389.60
5. Step 5: Solve for x
   x = 5,109,389.60/2,663.48
6. Step 6: Final answer
   x = 1,918.31