Finding the Fourth Proportional to 2,826.15, 4,207.56 and 2,812.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,826.15 : 4,207.56 = 2,812.47 : x
2. Step 2: Convert to fraction form
   2,826.15/4,207.56 = 2,812.47/x
3. Step 3: Cross multiply
   2,826.15x = 4,207.56 × 2,812.47
4. Step 4: Simplify right side
   2,826.15x = 11,833,636.27
5. Step 5: Solve for x
   x = 11,833,636.27/2,826.15
6. Step 6: Final answer
   x = 4,187.19