Finding the Fourth Proportional to 1,073.76, 1,610.89 and 343.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,073.76 : 1,610.89 = 343.34 : x
2. Step 2: Convert to fraction form
   1,073.76/1,610.89 = 343.34/x
3. Step 3: Cross multiply
   1,073.76x = 1,610.89 × 343.34
4. Step 4: Simplify right side
   1,073.76x = 553,080.10
5. Step 5: Solve for x
   x = 553,080.10/1,073.76
6. Step 6: Final answer
   x = 515.09