Finding the Fourth Proportional to 1,316.34, 1,815.77 and 961.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,316.34 : 1,815.77 = 961.83 : x
2. Step 2: Convert to fraction form
   1,316.34/1,815.77 = 961.83/x
3. Step 3: Cross multiply
   1,316.34x = 1,815.77 × 961.83
4. Step 4: Simplify right side
   1,316.34x = 1,746,457.25
5. Step 5: Solve for x
   x = 1,746,457.25/1,316.34
6. Step 6: Final answer
   x = 1,326.75