Finding the Fourth Proportional to 3,391.49, 5,086.71 and 926.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,391.49 : 5,086.71 = 926.50 : x
2. Step 2: Convert to fraction form
   3,391.49/5,086.71 = 926.50/x
3. Step 3: Cross multiply
   3,391.49x = 5,086.71 × 926.50
4. Step 4: Simplify right side
   3,391.49x = 4,712,836.82
5. Step 5: Solve for x
   x = 4,712,836.82/3,391.49
6. Step 6: Final answer
   x = 1,389.61