Finding the Fourth Proportional to 1,039.88, 1,559.86 and 346.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.88 : 1,559.86 = 346.52 : x
2. Step 2: Convert to fraction form
   1,039.88/1,559.86 = 346.52/x
3. Step 3: Cross multiply
   1,039.88x = 1,559.86 × 346.52
4. Step 4: Simplify right side
   1,039.88x = 540,522.69
5. Step 5: Solve for x
   x = 540,522.69/1,039.88
6. Step 6: Final answer
   x = 519.79