Finding the Fourth Proportional to 1,111.24, 1,667.16 and 648.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.24 : 1,667.16 = 648.92 : x
2. Step 2: Convert to fraction form
   1,111.24/1,667.16 = 648.92/x
3. Step 3: Cross multiply
   1,111.24x = 1,667.16 × 648.92
4. Step 4: Simplify right side
   1,111.24x = 1,081,853.47
5. Step 5: Solve for x
   x = 1,081,853.47/1,111.24
6. Step 6: Final answer
   x = 973.56