Finding the Fourth Proportional to 3,372.72, 5,058.52 and 907.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,372.72 : 5,058.52 = 907.80 : x
2. Step 2: Convert to fraction form
   3,372.72/5,058.52 = 907.80/x
3. Step 3: Cross multiply
   3,372.72x = 5,058.52 × 907.80
4. Step 4: Simplify right side
   3,372.72x = 4,592,124.46
5. Step 5: Solve for x
   x = 4,592,124.46/3,372.72
6. Step 6: Final answer
   x = 1,361.55