Finding the Fourth Proportional to 1,107.89, 1,660.27 and 614.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,107.89 : 1,660.27 = 614.52 : x
2. Step 2: Convert to fraction form
   1,107.89/1,660.27 = 614.52/x
3. Step 3: Cross multiply
   1,107.89x = 1,660.27 × 614.52
4. Step 4: Simplify right side
   1,107.89x = 1,020,260.82
5. Step 5: Solve for x
   x = 1,020,260.82/1,107.89
6. Step 6: Final answer
   x = 920.90