Finding the Fourth Proportional to 1,591.95, 2,196.98 and 928.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.95 : 2,196.98 = 928.77 : x
2. Step 2: Convert to fraction form
   1,591.95/2,196.98 = 928.77/x
3. Step 3: Cross multiply
   1,591.95x = 2,196.98 × 928.77
4. Step 4: Simplify right side
   1,591.95x = 2,040,484.47
5. Step 5: Solve for x
   x = 2,040,484.47/1,591.95
6. Step 6: Final answer
   x = 1,281.75