Finding the Fourth Proportional to 1,371.88, 2,058.41 and 909.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.88 : 2,058.41 = 909.82 : x
2. Step 2: Convert to fraction form
   1,371.88/2,058.41 = 909.82/x
3. Step 3: Cross multiply
   1,371.88x = 2,058.41 × 909.82
4. Step 4: Simplify right side
   1,371.88x = 1,872,782.59
5. Step 5: Solve for x
   x = 1,872,782.59/1,371.88
6. Step 6: Final answer
   x = 1,365.12