Finding the Fourth Proportional to 2,157.12, 3,233.38 and 1,230.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157.12 : 3,233.38 = 1,230.69 : x
2. Step 2: Convert to fraction form
   2,157.12/3,233.38 = 1,230.69/x
3. Step 3: Cross multiply
   2,157.12x = 3,233.38 × 1,230.69
4. Step 4: Simplify right side
   2,157.12x = 3,979,288.43
5. Step 5: Solve for x
   x = 3,979,288.43/2,157.12
6. Step 6: Final answer
   x = 1,844.72