Finding the Fourth Proportional to 1,391.22, 2,089.62 and 1,196.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.22 : 2,089.62 = 1,196.10 : x
2. Step 2: Convert to fraction form
   1,391.22/2,089.62 = 1,196.10/x
3. Step 3: Cross multiply
   1,391.22x = 2,089.62 × 1,196.10
4. Step 4: Simplify right side
   1,391.22x = 2,499,394.48
5. Step 5: Solve for x
   x = 2,499,394.48/1,391.22
6. Step 6: Final answer
   x = 1,796.55