Finding the Fourth Proportional to 3,287.72, 4,931.69 and 1,066.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,287.72 : 4,931.69 = 1,066.49 : x
2. Step 2: Convert to fraction form
   3,287.72/4,931.69 = 1,066.49/x
3. Step 3: Cross multiply
   3,287.72x = 4,931.69 × 1,066.49
4. Step 4: Simplify right side
   3,287.72x = 5,259,598.07
5. Step 5: Solve for x
   x = 5,259,598.07/3,287.72
6. Step 6: Final answer
   x = 1,599.77