Finding the Fourth Proportional to 1,426.86, 1,969.68 and 961.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.86 : 1,969.68 = 961.38 : x
2. Step 2: Convert to fraction form
   1,426.86/1,969.68 = 961.38/x
3. Step 3: Cross multiply
   1,426.86x = 1,969.68 × 961.38
4. Step 4: Simplify right side
   1,426.86x = 1,893,610.96
5. Step 5: Solve for x
   x = 1,893,610.96/1,426.86
6. Step 6: Final answer
   x = 1,327.12