Finding the Fourth Proportional to 2,142.81, 3,212.52 and 1,440.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.81 : 3,212.52 = 1,440.73 : x
2. Step 2: Convert to fraction form
   2,142.81/3,212.52 = 1,440.73/x
3. Step 3: Cross multiply
   2,142.81x = 3,212.52 × 1,440.73
4. Step 4: Simplify right side
   2,142.81x = 4,628,373.94
5. Step 5: Solve for x
   x = 4,628,373.94/2,142.81
6. Step 6: Final answer
   x = 2,159.96