Finding the Fourth Proportional to 1,111.12, 1,665.16 and 649.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.12 : 1,665.16 = 649.01 : x
2. Step 2: Convert to fraction form
   1,111.12/1,665.16 = 649.01/x
3. Step 3: Cross multiply
   1,111.12x = 1,665.16 × 649.01
4. Step 4: Simplify right side
   1,111.12x = 1,080,708.03
5. Step 5: Solve for x
   x = 1,080,708.03/1,111.12
6. Step 6: Final answer
   x = 972.63