Finding the Fourth Proportional to 1,857.37, 2,783.61 and 760.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,857.37 : 2,783.61 = 760.48 : x
2. Step 2: Convert to fraction form
   1,857.37/2,783.61 = 760.48/x
3. Step 3: Cross multiply
   1,857.37x = 2,783.61 × 760.48
4. Step 4: Simplify right side
   1,857.37x = 2,116,879.73
5. Step 5: Solve for x
   x = 2,116,879.73/1,857.37
6. Step 6: Final answer
   x = 1,139.72