Finding the Fourth Proportional to 1,111.59, 1,666.87 and 649.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.59 : 1,666.87 = 649.51 : x
2. Step 2: Convert to fraction form
   1,111.59/1,666.87 = 649.51/x
3. Step 3: Cross multiply
   1,111.59x = 1,666.87 × 649.51
4. Step 4: Simplify right side
   1,111.59x = 1,082,639.69
5. Step 5: Solve for x
   x = 1,082,639.69/1,111.59
6. Step 6: Final answer
   x = 973.96