Finding the Fourth Proportional to 3,111.70, 4,294.77 and 1,786.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.70 : 4,294.77 = 1,786.31 : x
2. Step 2: Convert to fraction form
   3,111.70/4,294.77 = 1,786.31/x
3. Step 3: Cross multiply
   3,111.70x = 4,294.77 × 1,786.31
4. Step 4: Simplify right side
   3,111.70x = 7,671,790.60
5. Step 5: Solve for x
   x = 7,671,790.60/3,111.70
6. Step 6: Final answer
   x = 2,465.47