Finding the Fourth Proportional to 1,335.46, 1,840.74 and 1,040.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.46 : 1,840.74 = 1,040.22 : x
2. Step 2: Convert to fraction form
   1,335.46/1,840.74 = 1,040.22/x
3. Step 3: Cross multiply
   1,335.46x = 1,840.74 × 1,040.22
4. Step 4: Simplify right side
   1,335.46x = 1,914,774.56
5. Step 5: Solve for x
   x = 1,914,774.56/1,335.46
6. Step 6: Final answer
   x = 1,433.79