Finding the Fourth Proportional to 1,109.72, 1,660.10 and 927.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.72 : 1,660.10 = 927.48 : x
2. Step 2: Convert to fraction form
   1,109.72/1,660.10 = 927.48/x
3. Step 3: Cross multiply
   1,109.72x = 1,660.10 × 927.48
4. Step 4: Simplify right side
   1,109.72x = 1,539,709.55
5. Step 5: Solve for x
   x = 1,539,709.55/1,109.72
6. Step 6: Final answer
   x = 1,387.48