Finding the Fourth Proportional to 1,117.98, 1,676.78 and 348.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,117.98 : 1,676.78 = 348.42 : x
2. Step 2: Convert to fraction form
   1,117.98/1,676.78 = 348.42/x
3. Step 3: Cross multiply
   1,117.98x = 1,676.78 × 348.42
4. Step 4: Simplify right side
   1,117.98x = 584,223.69
5. Step 5: Solve for x
   x = 584,223.69/1,117.98
6. Step 6: Final answer
   x = 522.57