Finding the Fourth Proportional to 1,069.86, 1,601.16 and 659.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069.86 : 1,601.16 = 659.28 : x
2. Step 2: Convert to fraction form
   1,069.86/1,601.16 = 659.28/x
3. Step 3: Cross multiply
   1,069.86x = 1,601.16 × 659.28
4. Step 4: Simplify right side
   1,069.86x = 1,055,612.76
5. Step 5: Solve for x
   x = 1,055,612.76/1,069.86
6. Step 6: Final answer
   x = 986.68