Finding the Fourth Proportional to 1,111.74, 1,667.28 and 649.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.74 : 1,667.28 = 649.44 : x
2. Step 2: Convert to fraction form
   1,111.74/1,667.28 = 649.44/x
3. Step 3: Cross multiply
   1,111.74x = 1,667.28 × 649.44
4. Step 4: Simplify right side
   1,111.74x = 1,082,798.32
5. Step 5: Solve for x
   x = 1,082,798.32/1,111.74
6. Step 6: Final answer
   x = 973.97