Finding the Fourth Proportional to 1,111.42, 1,662.36 and 648.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.42 : 1,662.36 = 648.04 : x
2. Step 2: Convert to fraction form
   1,111.42/1,662.36 = 648.04/x
3. Step 3: Cross multiply
   1,111.42x = 1,662.36 × 648.04
4. Step 4: Simplify right side
   1,111.42x = 1,077,275.77
5. Step 5: Solve for x
   x = 1,077,275.77/1,111.42
6. Step 6: Final answer
   x = 969.28