Finding the Fourth Proportional to 1,091.55, 1,506.51 and 649.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.55 : 1,506.51 = 649.56 : x
2. Step 2: Convert to fraction form
   1,091.55/1,506.51 = 649.56/x
3. Step 3: Cross multiply
   1,091.55x = 1,506.51 × 649.56
4. Step 4: Simplify right side
   1,091.55x = 978,568.64
5. Step 5: Solve for x
   x = 978,568.64/1,091.55
6. Step 6: Final answer
   x = 896.49