Finding the Fourth Proportional to 3,128.79, 4,693.86 and 937.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.79 : 4,693.86 = 937.71 : x
2. Step 2: Convert to fraction form
   3,128.79/4,693.86 = 937.71/x
3. Step 3: Cross multiply
   3,128.79x = 4,693.86 × 937.71
4. Step 4: Simplify right side
   3,128.79x = 4,401,479.46
5. Step 5: Solve for x
   x = 4,401,479.46/3,128.79
6. Step 6: Final answer
   x = 1,406.77