Finding the Fourth Proportional to 1,555.83, 2,147.46 and 918.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.83 : 2,147.46 = 918.33 : x
2. Step 2: Convert to fraction form
   1,555.83/2,147.46 = 918.33/x
3. Step 3: Cross multiply
   1,555.83x = 2,147.46 × 918.33
4. Step 4: Simplify right side
   1,555.83x = 1,972,076.94
5. Step 5: Solve for x
   x = 1,972,076.94/1,555.83
6. Step 6: Final answer
   x = 1,267.54