Finding the Fourth Proportional to 2,772.29, 4,157.73 and 1,212.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,772.29 : 4,157.73 = 1,212.71 : x
2. Step 2: Convert to fraction form
   2,772.29/4,157.73 = 1,212.71/x
3. Step 3: Cross multiply
   2,772.29x = 4,157.73 × 1,212.71
4. Step 4: Simplify right side
   2,772.29x = 5,042,099.96
5. Step 5: Solve for x
   x = 5,042,099.96/2,772.29
6. Step 6: Final answer
   x = 1,818.75