Finding the Fourth Proportional to 3,680.88, 5,521.37 and 907.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,680.88 : 5,521.37 = 907.55 : x
2. Step 2: Convert to fraction form
   3,680.88/5,521.37 = 907.55/x
3. Step 3: Cross multiply
   3,680.88x = 5,521.37 × 907.55
4. Step 4: Simplify right side
   3,680.88x = 5,010,919.34
5. Step 5: Solve for x
   x = 5,010,919.34/3,680.88
6. Step 6: Final answer
   x = 1,361.34