Finding the Fourth Proportional to 1,591.51, 2,196.36 and 928.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.51 : 2,196.36 = 928.32 : x
2. Step 2: Convert to fraction form
   1,591.51/2,196.36 = 928.32/x
3. Step 3: Cross multiply
   1,591.51x = 2,196.36 × 928.32
4. Step 4: Simplify right side
   1,591.51x = 2,038,924.92
5. Step 5: Solve for x
   x = 2,038,924.92/1,591.51
6. Step 6: Final answer
   x = 1,281.13