Finding the Fourth Proportional to 2,039.42, 2,815.98 and 1,331.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.42 : 2,815.98 = 1,331.48 : x
2. Step 2: Convert to fraction form
   2,039.42/2,815.98 = 1,331.48/x
3. Step 3: Cross multiply
   2,039.42x = 2,815.98 × 1,331.48
4. Step 4: Simplify right side
   2,039.42x = 3,749,421.05
5. Step 5: Solve for x
   x = 3,749,421.05/2,039.42
6. Step 6: Final answer
   x = 1,838.47