Finding the Fourth Proportional to 1,440.63, 1,988.18 and 880.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.63 : 1,988.18 = 880.97 : x
2. Step 2: Convert to fraction form
   1,440.63/1,988.18 = 880.97/x
3. Step 3: Cross multiply
   1,440.63x = 1,988.18 × 880.97
4. Step 4: Simplify right side
   1,440.63x = 1,751,512.59
5. Step 5: Solve for x
   x = 1,751,512.59/1,440.63
6. Step 6: Final answer
   x = 1,215.80