Finding the Fourth Proportional to 1,106.91, 1,527.59 and 664.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,106.91 : 1,527.59 = 664.83 : x
2. Step 2: Convert to fraction form
   1,106.91/1,527.59 = 664.83/x
3. Step 3: Cross multiply
   1,106.91x = 1,527.59 × 664.83
4. Step 4: Simplify right side
   1,106.91x = 1,015,589.32
5. Step 5: Solve for x
   x = 1,015,589.32/1,106.91
6. Step 6: Final answer
   x = 917.50