Finding the Fourth Proportional to 1,061.11, 1,591.34 and 367.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.11 : 1,591.34 = 367.61 : x
2. Step 2: Convert to fraction form
   1,061.11/1,591.34 = 367.61/x
3. Step 3: Cross multiply
   1,061.11x = 1,591.34 × 367.61
4. Step 4: Simplify right side
   1,061.11x = 584,999.43
5. Step 5: Solve for x
   x = 584,999.43/1,061.11
6. Step 6: Final answer
   x = 551.31