Finding the Fourth Proportional to 2,723.76, 4,086.72 and 1,407.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,723.76 : 4,086.72 = 1,407.96 : x
2. Step 2: Convert to fraction form
   2,723.76/4,086.72 = 1,407.96/x
3. Step 3: Cross multiply
   2,723.76x = 4,086.72 × 1,407.96
4. Step 4: Simplify right side
   2,723.76x = 5,753,938.29
5. Step 5: Solve for x
   x = 5,753,938.29/2,723.76
6. Step 6: Final answer
   x = 2,112.50