Finding the Fourth Proportional to 2,111.27, 3,167.04 and 812.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.27 : 3,167.04 = 812.74 : x
2. Step 2: Convert to fraction form
   2,111.27/3,167.04 = 812.74/x
3. Step 3: Cross multiply
   2,111.27x = 3,167.04 × 812.74
4. Step 4: Simplify right side
   2,111.27x = 2,573,980.09
5. Step 5: Solve for x
   x = 2,573,980.09/2,111.27
6. Step 6: Final answer
   x = 1,219.16