Finding the Fourth Proportional to 1,111.49, 1,666.72 and 649.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.49 : 1,666.72 = 649.41 : x
2. Step 2: Convert to fraction form
   1,111.49/1,666.72 = 649.41/x
3. Step 3: Cross multiply
   1,111.49x = 1,666.72 × 649.41
4. Step 4: Simplify right side
   1,111.49x = 1,082,384.64
5. Step 5: Solve for x
   x = 1,082,384.64/1,111.49
6. Step 6: Final answer
   x = 973.81