Finding the Fourth Proportional to 1,540.71, 2,308.82 and 880.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,540.71 : 2,308.82 = 880.55 : x
2. Step 2: Convert to fraction form
   1,540.71/2,308.82 = 880.55/x
3. Step 3: Cross multiply
   1,540.71x = 2,308.82 × 880.55
4. Step 4: Simplify right side
   1,540.71x = 2,033,031.45
5. Step 5: Solve for x
   x = 2,033,031.45/1,540.71
6. Step 6: Final answer
   x = 1,319.54