Finding the Fourth Proportional to 1,322.72, 1,986.33 and 1,103.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,322.72 : 1,986.33 = 1,103.12 : x
2. Step 2: Convert to fraction form
   1,322.72/1,986.33 = 1,103.12/x
3. Step 3: Cross multiply
   1,322.72x = 1,986.33 × 1,103.12
4. Step 4: Simplify right side
   1,322.72x = 2,191,160.35
5. Step 5: Solve for x
   x = 2,191,160.35/1,322.72
6. Step 6: Final answer
   x = 1,656.56