Finding the Fourth Proportional to 1,591.33, 2,196.06 and 961.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.33 : 2,196.06 = 961.86 : x
2. Step 2: Convert to fraction form
   1,591.33/2,196.06 = 961.86/x
3. Step 3: Cross multiply
   1,591.33x = 2,196.06 × 961.86
4. Step 4: Simplify right side
   1,591.33x = 2,112,302.27
5. Step 5: Solve for x
   x = 2,112,302.27/1,591.33
6. Step 6: Final answer
   x = 1,327.38