Finding the Fourth Proportional to 2,658.78, 3,667.68 and 1,610.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658.78 : 3,667.68 = 1,610.91 : x
2. Step 2: Convert to fraction form
   2,658.78/3,667.68 = 1,610.91/x
3. Step 3: Cross multiply
   2,658.78x = 3,667.68 × 1,610.91
4. Step 4: Simplify right side
   2,658.78x = 5,908,302.39
5. Step 5: Solve for x
   x = 5,908,302.39/2,658.78
6. Step 6: Final answer
   x = 2,222.19