Finding the Fourth Proportional to 1,353.81, 1,868.89 and 955.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.81 : 1,868.89 = 955.80 : x
2. Step 2: Convert to fraction form
   1,353.81/1,868.89 = 955.80/x
3. Step 3: Cross multiply
   1,353.81x = 1,868.89 × 955.80
4. Step 4: Simplify right side
   1,353.81x = 1,786,282.67
5. Step 5: Solve for x
   x = 1,786,282.67/1,353.81
6. Step 6: Final answer
   x = 1,319.45