Finding the Fourth Proportional to 3,522.21, 5,281.83 and 1,440.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,522.21 : 5,281.83 = 1,440.78 : x
2. Step 2: Convert to fraction form
   3,522.21/5,281.83 = 1,440.78/x
3. Step 3: Cross multiply
   3,522.21x = 5,281.83 × 1,440.78
4. Step 4: Simplify right side
   3,522.21x = 7,609,955.03
5. Step 5: Solve for x
   x = 7,609,955.03/3,522.21
6. Step 6: Final answer
   x = 2,160.56