Finding the Fourth Proportional to 1,335.72, 1,839.45 and 1,331.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.72 : 1,839.45 = 1,331.67 : x
2. Step 2: Convert to fraction form
   1,335.72/1,839.45 = 1,331.67/x
3. Step 3: Cross multiply
   1,335.72x = 1,839.45 × 1,331.67
4. Step 4: Simplify right side
   1,335.72x = 2,449,540.38
5. Step 5: Solve for x
   x = 2,449,540.38/1,335.72
6. Step 6: Final answer
   x = 1,833.87