Finding the Fourth Proportional to 1,825.88, 2,519.58 and 1,039.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,825.88 : 2,519.58 = 1,039.90 : x
2. Step 2: Convert to fraction form
   1,825.88/2,519.58 = 1,039.90/x
3. Step 3: Cross multiply
   1,825.88x = 2,519.58 × 1,039.90
4. Step 4: Simplify right side
   1,825.88x = 2,620,111.24
5. Step 5: Solve for x
   x = 2,620,111.24/1,825.88
6. Step 6: Final answer
   x = 1,434.99