Finding the Fourth Proportional to 2,826.30, 3,901.86 and 2,117.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,826.30 : 3,901.86 = 2,117.91 : x
2. Step 2: Convert to fraction form
   2,826.30/3,901.86 = 2,117.91/x
3. Step 3: Cross multiply
   2,826.30x = 3,901.86 × 2,117.91
4. Step 4: Simplify right side
   2,826.30x = 8,263,788.31
5. Step 5: Solve for x
   x = 8,263,788.31/2,826.30
6. Step 6: Final answer
   x = 2,923.89