Finding the Fourth Proportional to 1,111.61, 1,667.24 and 649.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.61 : 1,667.24 = 649.59 : x
2. Step 2: Convert to fraction form
   1,111.61/1,667.24 = 649.59/x
3. Step 3: Cross multiply
   1,111.61x = 1,667.24 × 649.59
4. Step 4: Simplify right side
   1,111.61x = 1,083,019.18
5. Step 5: Solve for x
   x = 1,083,019.18/1,111.61
6. Step 6: Final answer
   x = 974.28