Finding the Fourth Proportional to 1,112.52, 1,665.30 and 649.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.52 : 1,665.30 = 649.08 : x
2. Step 2: Convert to fraction form
   1,112.52/1,665.30 = 649.08/x
3. Step 3: Cross multiply
   1,112.52x = 1,665.30 × 649.08
4. Step 4: Simplify right side
   1,112.52x = 1,080,912.92
5. Step 5: Solve for x
   x = 1,080,912.92/1,112.52
6. Step 6: Final answer
   x = 971.59