Finding the Fourth Proportional to 2,280.77, 3,145.36 and 1,440.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.77 : 3,145.36 = 1,440.01 : x
2. Step 2: Convert to fraction form
   2,280.77/3,145.36 = 1,440.01/x
3. Step 3: Cross multiply
   2,280.77x = 3,145.36 × 1,440.01
4. Step 4: Simplify right side
   2,280.77x = 4,529,361.32
5. Step 5: Solve for x
   x = 4,529,361.32/2,280.77
6. Step 6: Final answer
   x = 1,985.89