Finding the Fourth Proportional to 3,680.80, 5,521.16 and 907.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,680.80 : 5,521.16 = 907.49 : x
2. Step 2: Convert to fraction form
   3,680.80/5,521.16 = 907.49/x
3. Step 3: Cross multiply
   3,680.80x = 5,521.16 × 907.49
4. Step 4: Simplify right side
   3,680.80x = 5,010,413.56
5. Step 5: Solve for x
   x = 5,010,413.56/3,680.80
6. Step 6: Final answer
   x = 1,361.23