Finding the Fourth Proportional to 1,078.86, 1,618.24 and 348.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.86 : 1,618.24 = 348.42 : x
2. Step 2: Convert to fraction form
   1,078.86/1,618.24 = 348.42/x
3. Step 3: Cross multiply
   1,078.86x = 1,618.24 × 348.42
4. Step 4: Simplify right side
   1,078.86x = 563,826.31
5. Step 5: Solve for x
   x = 563,826.31/1,078.86
6. Step 6: Final answer
   x = 522.61