Finding the Fourth Proportional to 2,663.01, 3,993.71 and 1,275.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.01 : 3,993.71 = 1,275.63 : x
2. Step 2: Convert to fraction form
   2,663.01/3,993.71 = 1,275.63/x
3. Step 3: Cross multiply
   2,663.01x = 3,993.71 × 1,275.63
4. Step 4: Simplify right side
   2,663.01x = 5,094,489.91
5. Step 5: Solve for x
   x = 5,094,489.91/2,663.01
6. Step 6: Final answer
   x = 1,913.06