Finding the Fourth Proportional to 2,287.96, 3,415.37 and 2,116.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.96 : 3,415.37 = 2,116.76 : x
2. Step 2: Convert to fraction form
   2,287.96/3,415.37 = 2,116.76/x
3. Step 3: Cross multiply
   2,287.96x = 3,415.37 × 2,116.76
4. Step 4: Simplify right side
   2,287.96x = 7,229,500.55
5. Step 5: Solve for x
   x = 7,229,500.55/2,287.96
6. Step 6: Final answer
   x = 3,159.80