Finding the Fourth Proportional to 1,136.12, 1,567.83 and 664.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,136.12 : 1,567.83 = 664.34 : x
2. Step 2: Convert to fraction form
   1,136.12/1,567.83 = 664.34/x
3. Step 3: Cross multiply
   1,136.12x = 1,567.83 × 664.34
4. Step 4: Simplify right side
   1,136.12x = 1,041,572.18
5. Step 5: Solve for x
   x = 1,041,572.18/1,136.12
6. Step 6: Final answer
   x = 916.78