Finding the Fourth Proportional to 1,591.98, 2,196.61 and 928.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.98 : 2,196.61 = 928.86 : x
2. Step 2: Convert to fraction form
   1,591.98/2,196.61 = 928.86/x
3. Step 3: Cross multiply
   1,591.98x = 2,196.61 × 928.86
4. Step 4: Simplify right side
   1,591.98x = 2,040,343.16
5. Step 5: Solve for x
   x = 2,040,343.16/1,591.98
6. Step 6: Final answer
   x = 1,281.64