Finding the Fourth Proportional to 1,591.20, 2,196.40 and 962.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.20 : 2,196.40 = 962.08 : x
2. Step 2: Convert to fraction form
   1,591.20/2,196.40 = 962.08/x
3. Step 3: Cross multiply
   1,591.20x = 2,196.40 × 962.08
4. Step 4: Simplify right side
   1,591.20x = 2,113,112.51
5. Step 5: Solve for x
   x = 2,113,112.51/1,591.20
6. Step 6: Final answer
   x = 1,328.00