Finding the Fourth Proportional to 1,076.72, 1,614.72 and 346.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.72 : 1,614.72 = 346.40 : x
2. Step 2: Convert to fraction form
   1,076.72/1,614.72 = 346.40/x
3. Step 3: Cross multiply
   1,076.72x = 1,614.72 × 346.40
4. Step 4: Simplify right side
   1,076.72x = 559,339.01
5. Step 5: Solve for x
   x = 559,339.01/1,076.72
6. Step 6: Final answer
   x = 519.48