Finding the Fourth Proportional to 2,551.18, 3,827.34 and 907.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.18 : 3,827.34 = 907.72 : x
2. Step 2: Convert to fraction form
   2,551.18/3,827.34 = 907.72/x
3. Step 3: Cross multiply
   2,551.18x = 3,827.34 × 907.72
4. Step 4: Simplify right side
   2,551.18x = 3,474,153.06
5. Step 5: Solve for x
   x = 3,474,153.06/2,551.18
6. Step 6: Final answer
   x = 1,361.78