Finding the Fourth Proportional to 1,147.72, 1,721.61 and 367.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.72 : 1,721.61 = 367.83 : x
2. Step 2: Convert to fraction form
   1,147.72/1,721.61 = 367.83/x
3. Step 3: Cross multiply
   1,147.72x = 1,721.61 × 367.83
4. Step 4: Simplify right side
   1,147.72x = 633,259.81
5. Step 5: Solve for x
   x = 633,259.81/1,147.72
6. Step 6: Final answer
   x = 551.75