Finding the Fourth Proportional to 2,958.72, 4,085.76 and 1,912.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,958.72 : 4,085.76 = 1,912.56 : x
2. Step 2: Convert to fraction form
   2,958.72/4,085.76 = 1,912.56/x
3. Step 3: Cross multiply
   2,958.72x = 4,085.76 × 1,912.56
4. Step 4: Simplify right side
   2,958.72x = 7,814,261.15
5. Step 5: Solve for x
   x = 7,814,261.15/2,958.72
6. Step 6: Final answer
   x = 2,641.10