Finding the Fourth Proportional to 1,061.09, 1,591.06 and 367.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.09 : 1,591.06 = 367.71 : x
2. Step 2: Convert to fraction form
   1,061.09/1,591.06 = 367.71/x
3. Step 3: Cross multiply
   1,061.09x = 1,591.06 × 367.71
4. Step 4: Simplify right side
   1,061.09x = 585,042.48
5. Step 5: Solve for x
   x = 585,042.48/1,061.09
6. Step 6: Final answer
   x = 551.36