Finding the Fourth Proportional to 1,381.50, 1,905.39 and 961.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.50 : 1,905.39 = 961.83 : x
2. Step 2: Convert to fraction form
   1,381.50/1,905.39 = 961.83/x
3. Step 3: Cross multiply
   1,381.50x = 1,905.39 × 961.83
4. Step 4: Simplify right side
   1,381.50x = 1,832,661.26
5. Step 5: Solve for x
   x = 1,832,661.26/1,381.50
6. Step 6: Final answer
   x = 1,326.57