Finding the Fourth Proportional to 1,113.48, 1,536.47 and 665.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.48 : 1,536.47 = 665.27 : x
2. Step 2: Convert to fraction form
   1,113.48/1,536.47 = 665.27/x
3. Step 3: Cross multiply
   1,113.48x = 1,536.47 × 665.27
4. Step 4: Simplify right side
   1,113.48x = 1,022,167.40
5. Step 5: Solve for x
   x = 1,022,167.40/1,113.48
6. Step 6: Final answer
   x = 917.99