Finding the Fourth Proportional to 1,591.55, 2,196.00 and 961.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.55 : 2,196.00 = 961.96 : x
2. Step 2: Convert to fraction form
   1,591.55/2,196.00 = 961.96/x
3. Step 3: Cross multiply
   1,591.55x = 2,196.00 × 961.96
4. Step 4: Simplify right side
   1,591.55x = 2,112,455.58
5. Step 5: Solve for x
   x = 2,112,455.58/1,591.55
6. Step 6: Final answer
   x = 1,327.29