Finding the Fourth Proportional to 1,591.22, 2,196.24 and 1,121.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.22 : 2,196.24 = 1,121.42 : x
2. Step 2: Convert to fraction form
   1,591.22/2,196.24 = 1,121.42/x
3. Step 3: Cross multiply
   1,591.22x = 2,196.24 × 1,121.42
4. Step 4: Simplify right side
   1,591.22x = 2,462,907.46
5. Step 5: Solve for x
   x = 2,462,907.46/1,591.22
6. Step 6: Final answer
   x = 1,547.81