Finding the Fourth Proportional to 2,790.79, 3,851.26 and 1,531.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,790.79 : 3,851.26 = 1,531.78 : x
2. Step 2: Convert to fraction form
   2,790.79/3,851.26 = 1,531.78/x
3. Step 3: Cross multiply
   2,790.79x = 3,851.26 × 1,531.78
4. Step 4: Simplify right side
   2,790.79x = 5,899,269.59
5. Step 5: Solve for x
   x = 5,899,269.59/2,790.79
6. Step 6: Final answer
   x = 2,113.84