Finding the Fourth Proportional to 1,168.12, 1,611.71 and 664.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.12 : 1,611.71 = 664.00 : x
2. Step 2: Convert to fraction form
   1,168.12/1,611.71 = 664.00/x
3. Step 3: Cross multiply
   1,168.12x = 1,611.71 × 664.00
4. Step 4: Simplify right side
   1,168.12x = 1,070,174.32
5. Step 5: Solve for x
   x = 1,070,174.32/1,168.12
6. Step 6: Final answer
   x = 916.15