Finding the Fourth Proportional to 3,128.94, 4,317.89 and 1,731.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.94 : 4,317.89 = 1,731.69 : x
2. Step 2: Convert to fraction form
   3,128.94/4,317.89 = 1,731.69/x
3. Step 3: Cross multiply
   3,128.94x = 4,317.89 × 1,731.69
4. Step 4: Simplify right side
   3,128.94x = 7,477,238.28
5. Step 5: Solve for x
   x = 7,477,238.28/3,128.94
6. Step 6: Final answer
   x = 2,389.70