Finding the Fourth Proportional to 1,491.33, 2,233.59 and 711.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.33 : 2,233.59 = 711.88 : x
2. Step 2: Convert to fraction form
   1,491.33/2,233.59 = 711.88/x
3. Step 3: Cross multiply
   1,491.33x = 2,233.59 × 711.88
4. Step 4: Simplify right side
   1,491.33x = 1,590,048.08
5. Step 5: Solve for x
   x = 1,590,048.08/1,491.33
6. Step 6: Final answer
   x = 1,066.19