Finding the Fourth Proportional to 1,856.03, 2,785.46 and 761.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.03 : 2,785.46 = 761.31 : x
2. Step 2: Convert to fraction form
   1,856.03/2,785.46 = 761.31/x
3. Step 3: Cross multiply
   1,856.03x = 2,785.46 × 761.31
4. Step 4: Simplify right side
   1,856.03x = 2,120,594.75
5. Step 5: Solve for x
   x = 2,120,594.75/1,856.03
6. Step 6: Final answer
   x = 1,142.55