Finding the Fourth Proportional to 1,106.82, 1,526.88 and 664.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,106.82 : 1,526.88 = 664.64 : x
2. Step 2: Convert to fraction form
   1,106.82/1,526.88 = 664.64/x
3. Step 3: Cross multiply
   1,106.82x = 1,526.88 × 664.64
4. Step 4: Simplify right side
   1,106.82x = 1,014,817.89
5. Step 5: Solve for x
   x = 1,014,817.89/1,106.82
6. Step 6: Final answer
   x = 916.88