Finding the Fourth Proportional to 3,710.81, 5,120.96 and 2,531.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,710.81 : 5,120.96 = 2,531.86 : x
2. Step 2: Convert to fraction form
   3,710.81/5,120.96 = 2,531.86/x
3. Step 3: Cross multiply
   3,710.81x = 5,120.96 × 2,531.86
4. Step 4: Simplify right side
   3,710.81x = 12,965,528.32
5. Step 5: Solve for x
   x = 12,965,528.32/3,710.81
6. Step 6: Final answer
   x = 3,493.99