Finding the Fourth Proportional to 1,591.34, 2,196.18 and 928.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.34 : 2,196.18 = 928.22 : x
2. Step 2: Convert to fraction form
   1,591.34/2,196.18 = 928.22/x
3. Step 3: Cross multiply
   1,591.34x = 2,196.18 × 928.22
4. Step 4: Simplify right side
   1,591.34x = 2,038,538.20
5. Step 5: Solve for x
   x = 2,038,538.20/1,591.34
6. Step 6: Final answer
   x = 1,281.02