Finding the Fourth Proportional to 1,433.72, 1,979.48 and 1,101.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.72 : 1,979.48 = 1,101.55 : x
2. Step 2: Convert to fraction form
   1,433.72/1,979.48 = 1,101.55/x
3. Step 3: Cross multiply
   1,433.72x = 1,979.48 × 1,101.55
4. Step 4: Simplify right side
   1,433.72x = 2,180,496.19
5. Step 5: Solve for x
   x = 2,180,496.19/1,433.72
6. Step 6: Final answer
   x = 1,520.87