Finding the Fourth Proportional to 1,074.98, 1,612.69 and 344.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.98 : 1,612.69 = 344.61 : x
2. Step 2: Convert to fraction form
   1,074.98/1,612.69 = 344.61/x
3. Step 3: Cross multiply
   1,074.98x = 1,612.69 × 344.61
4. Step 4: Simplify right side
   1,074.98x = 555,749.10
5. Step 5: Solve for x
   x = 555,749.10/1,074.98
6. Step 6: Final answer
   x = 516.99