Finding the Fourth Proportional to 3,426.91, 5,120.31 and 2,533.65

Step by Step Solution

1. Step 1: Write the proportion equation
   3,426.91 : 5,120.31 = 2,533.65 : x
2. Step 2: Convert to fraction form
   3,426.91/5,120.31 = 2,533.65/x
3. Step 3: Cross multiply
   3,426.91x = 5,120.31 × 2,533.65
4. Step 4: Simplify right side
   3,426.91x = 12,973,063.73
5. Step 5: Solve for x
   x = 12,973,063.73/3,426.91
6. Step 6: Final answer
   x = 3,785.65