Finding the Fourth Proportional to 1,154.72, 1,730.21 and 1,111.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,154.72 : 1,730.21 = 1,111.52 : x
2. Step 2: Convert to fraction form
   1,154.72/1,730.21 = 1,111.52/x
3. Step 3: Cross multiply
   1,154.72x = 1,730.21 × 1,111.52
4. Step 4: Simplify right side
   1,154.72x = 1,923,161.79
5. Step 5: Solve for x
   x = 1,923,161.79/1,154.72
6. Step 6: Final answer
   x = 1,665.48