Finding the Fourth Proportional to 1,591.35, 2,196.12 and 961.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.35 : 2,196.12 = 961.76 : x
2. Step 2: Convert to fraction form
   1,591.35/2,196.12 = 961.76/x
3. Step 3: Cross multiply
   1,591.35x = 2,196.12 × 961.76
4. Step 4: Simplify right side
   1,591.35x = 2,112,134.88
5. Step 5: Solve for x
   x = 2,112,134.88/1,591.35
6. Step 6: Final answer
   x = 1,327.26