Finding the Fourth Proportional to 3,925.30, 5,411.50 and 3,131.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,925.30 : 5,411.50 = 3,131.32 : x
2. Step 2: Convert to fraction form
   3,925.30/5,411.50 = 3,131.32/x
3. Step 3: Cross multiply
   3,925.30x = 5,411.50 × 3,131.32
4. Step 4: Simplify right side
   3,925.30x = 16,945,120.56
5. Step 5: Solve for x
   x = 16,945,120.56/3,925.30
6. Step 6: Final answer
   x = 4,316.90