Finding the Fourth Proportional to 1,106.69, 1,527.35 and 664.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,106.69 : 1,527.35 = 664.56 : x
2. Step 2: Convert to fraction form
   1,106.69/1,527.35 = 664.56/x
3. Step 3: Cross multiply
   1,106.69x = 1,527.35 × 664.56
4. Step 4: Simplify right side
   1,106.69x = 1,015,012.39
5. Step 5: Solve for x
   x = 1,015,012.39/1,106.69
6. Step 6: Final answer
   x = 917.16