Finding the Fourth Proportional to 2,658.42, 3,988.35 and 927.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658.42 : 3,988.35 = 927.18 : x
2. Step 2: Convert to fraction form
   2,658.42/3,988.35 = 927.18/x
3. Step 3: Cross multiply
   2,658.42x = 3,988.35 × 927.18
4. Step 4: Simplify right side
   2,658.42x = 3,697,918.35
5. Step 5: Solve for x
   x = 3,697,918.35/2,658.42
6. Step 6: Final answer
   x = 1,391.02