Finding the Fourth Proportional to 1,447.98, 2,168.31 and 1,039.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.98 : 2,168.31 = 1,039.74 : x
2. Step 2: Convert to fraction form
   1,447.98/2,168.31 = 1,039.74/x
3. Step 3: Cross multiply
   1,447.98x = 2,168.31 × 1,039.74
4. Step 4: Simplify right side
   1,447.98x = 2,254,478.64
5. Step 5: Solve for x
   x = 2,254,478.64/1,447.98
6. Step 6: Final answer
   x = 1,556.98