Finding the Fourth Proportional to 2,790.72, 3,850.76 and 1,611.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,790.72 : 3,850.76 = 1,611.56 : x
2. Step 2: Convert to fraction form
   2,790.72/3,850.76 = 1,611.56/x
3. Step 3: Cross multiply
   2,790.72x = 3,850.76 × 1,611.56
4. Step 4: Simplify right side
   2,790.72x = 6,205,735.38
5. Step 5: Solve for x
   x = 6,205,735.38/2,790.72
6. Step 6: Final answer
   x = 2,223.70