Finding the Fourth Proportional to 1,825.86, 2,519.46 and 1,039.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,825.86 : 2,519.46 = 1,039.80 : x
2. Step 2: Convert to fraction form
   1,825.86/2,519.46 = 1,039.80/x
3. Step 3: Cross multiply
   1,825.86x = 2,519.46 × 1,039.80
4. Step 4: Simplify right side
   1,825.86x = 2,619,734.51
5. Step 5: Solve for x
   x = 2,619,734.51/1,825.86
6. Step 6: Final answer
   x = 1,434.79