Finding the Fourth Proportional to 1,860.57, 2,789.37 and 1,203.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,860.57 : 2,789.37 = 1,203.12 : x
2. Step 2: Convert to fraction form
   1,860.57/2,789.37 = 1,203.12/x
3. Step 3: Cross multiply
   1,860.57x = 2,789.37 × 1,203.12
4. Step 4: Simplify right side
   1,860.57x = 3,355,946.83
5. Step 5: Solve for x
   x = 3,355,946.83/1,860.57
6. Step 6: Final answer
   x = 1,803.72