Finding the Fourth Proportional to 1,478.58, 2,204.45 and 1,440.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.58 : 2,204.45 = 1,440.10 : x
2. Step 2: Convert to fraction form
   1,478.58/2,204.45 = 1,440.10/x
3. Step 3: Cross multiply
   1,478.58x = 2,204.45 × 1,440.10
4. Step 4: Simplify right side
   1,478.58x = 3,174,628.45
5. Step 5: Solve for x
   x = 3,174,628.45/1,478.58
6. Step 6: Final answer
   x = 2,147.08