Finding the Fourth Proportional to 3,112.16, 4,665.12 and 1,958.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,112.16 : 4,665.12 = 1,958.72 : x
2. Step 2: Convert to fraction form
   3,112.16/4,665.12 = 1,958.72/x
3. Step 3: Cross multiply
   3,112.16x = 4,665.12 × 1,958.72
4. Step 4: Simplify right side
   3,112.16x = 9,137,663.85
5. Step 5: Solve for x
   x = 9,137,663.85/3,112.16
6. Step 6: Final answer
   x = 2,936.12