Finding the Fourth Proportional to 2,638.94, 3,958.95 and 907.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.94 : 3,958.95 = 907.34 : x
2. Step 2: Convert to fraction form
   2,638.94/3,958.95 = 907.34/x
3. Step 3: Cross multiply
   2,638.94x = 3,958.95 × 907.34
4. Step 4: Simplify right side
   2,638.94x = 3,592,113.69
5. Step 5: Solve for x
   x = 3,592,113.69/2,638.94
6. Step 6: Final answer
   x = 1,361.20