Finding the Fourth Proportional to 2,158.52, 3,238.11 and 771.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.52 : 3,238.11 = 771.46 : x
2. Step 2: Convert to fraction form
   2,158.52/3,238.11 = 771.46/x
3. Step 3: Cross multiply
   2,158.52x = 3,238.11 × 771.46
4. Step 4: Simplify right side
   2,158.52x = 2,498,064.25
5. Step 5: Solve for x
   x = 2,498,064.25/2,158.52
6. Step 6: Final answer
   x = 1,157.31