Finding the Fourth Proportional to 1,591.67, 2,196.51 and 928.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.67 : 2,196.51 = 928.35 : x
2. Step 2: Convert to fraction form
   1,591.67/2,196.51 = 928.35/x
3. Step 3: Cross multiply
   1,591.67x = 2,196.51 × 928.35
4. Step 4: Simplify right side
   1,591.67x = 2,039,130.06
5. Step 5: Solve for x
   x = 2,039,130.06/1,591.67
6. Step 6: Final answer
   x = 1,281.13