Finding the Fourth Proportional to 2,111.18, 3,167.04 and 813.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.18 : 3,167.04 = 813.02 : x
2. Step 2: Convert to fraction form
   2,111.18/3,167.04 = 813.02/x
3. Step 3: Cross multiply
   2,111.18x = 3,167.04 × 813.02
4. Step 4: Simplify right side
   2,111.18x = 2,574,866.86
5. Step 5: Solve for x
   x = 2,574,866.86/2,111.18
6. Step 6: Final answer
   x = 1,219.63