Finding the Fourth Proportional to 1,613.98, 2,228.12 and 1,142.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,613.98 : 2,228.12 = 1,142.25 : x
2. Step 2: Convert to fraction form
   1,613.98/2,228.12 = 1,142.25/x
3. Step 3: Cross multiply
   1,613.98x = 2,228.12 × 1,142.25
4. Step 4: Simplify right side
   1,613.98x = 2,545,070.07
5. Step 5: Solve for x
   x = 2,545,070.07/1,613.98
6. Step 6: Final answer
   x = 1,576.89