Finding the Fourth Proportional to 2,158.99, 3,238.38 and 1,118.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.99 : 3,238.38 = 1,118.61 : x
2. Step 2: Convert to fraction form
   2,158.99/3,238.38 = 1,118.61/x
3. Step 3: Cross multiply
   2,158.99x = 3,238.38 × 1,118.61
4. Step 4: Simplify right side
   2,158.99x = 3,622,484.25
5. Step 5: Solve for x
   x = 3,622,484.25/2,158.99
6. Step 6: Final answer
   x = 1,677.86