Finding the Fourth Proportional to 2,173.10, 2,998.82 and 1,228.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,173.10 : 2,998.82 = 1,228.88 : x
2. Step 2: Convert to fraction form
   2,173.10/2,998.82 = 1,228.88/x
3. Step 3: Cross multiply
   2,173.10x = 2,998.82 × 1,228.88
4. Step 4: Simplify right side
   2,173.10x = 3,685,168.78
5. Step 5: Solve for x
   x = 3,685,168.78/2,173.10
6. Step 6: Final answer
   x = 1,695.82