Finding the Fourth Proportional to 1,440.43, 1,987.59 and 880.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.43 : 1,987.59 = 880.93 : x
2. Step 2: Convert to fraction form
   1,440.43/1,987.59 = 880.93/x
3. Step 3: Cross multiply
   1,440.43x = 1,987.59 × 880.93
4. Step 4: Simplify right side
   1,440.43x = 1,750,917.31
5. Step 5: Solve for x
   x = 1,750,917.31/1,440.43
6. Step 6: Final answer
   x = 1,215.55