Finding the Fourth Proportional to 2,162.58, 3,241.17 and 1,238.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.58 : 3,241.17 = 1,238.64 : x
2. Step 2: Convert to fraction form
   2,162.58/3,241.17 = 1,238.64/x
3. Step 3: Cross multiply
   2,162.58x = 3,241.17 × 1,238.64
4. Step 4: Simplify right side
   2,162.58x = 4,014,642.81
5. Step 5: Solve for x
   x = 4,014,642.81/2,162.58
6. Step 6: Final answer
   x = 1,856.41