Finding the Fourth Proportional to 2,157.57, 3,238.79 and 1,281.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157.57 : 3,238.79 = 1,281.96 : x
2. Step 2: Convert to fraction form
   2,157.57/3,238.79 = 1,281.96/x
3. Step 3: Cross multiply
   2,157.57x = 3,238.79 × 1,281.96
4. Step 4: Simplify right side
   2,157.57x = 4,151,992.82
5. Step 5: Solve for x
   x = 4,151,992.82/2,157.57
6. Step 6: Final answer
   x = 1,924.38