Finding the Fourth Proportional to 3,112.27, 4,300.40 and 2,487.95

Step by Step Solution

1. Step 1: Write the proportion equation
   3,112.27 : 4,300.40 = 2,487.95 : x
2. Step 2: Convert to fraction form
   3,112.27/4,300.40 = 2,487.95/x
3. Step 3: Cross multiply
   3,112.27x = 4,300.40 × 2,487.95
4. Step 4: Simplify right side
   3,112.27x = 10,699,171.69
5. Step 5: Solve for x
   x = 10,699,171.69/3,112.27
6. Step 6: Final answer
   x = 3,437.74