Finding the Fourth Proportional to 2,109.80, 3,165.98 and 955.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.80 : 3,165.98 = 955.56 : x
2. Step 2: Convert to fraction form
   2,109.80/3,165.98 = 955.56/x
3. Step 3: Cross multiply
   2,109.80x = 3,165.98 × 955.56
4. Step 4: Simplify right side
   2,109.80x = 3,025,283.85
5. Step 5: Solve for x
   x = 3,025,283.85/2,109.80
6. Step 6: Final answer
   x = 1,433.92