Finding the Fourth Proportional to 3,974.84, 5,956.72 and 3,386.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,974.84 : 5,956.72 = 3,386.78 : x
2. Step 2: Convert to fraction form
   3,974.84/5,956.72 = 3,386.78/x
3. Step 3: Cross multiply
   3,974.84x = 5,956.72 × 3,386.78
4. Step 4: Simplify right side
   3,974.84x = 20,174,100.16
5. Step 5: Solve for x
   x = 20,174,100.16/3,974.84
6. Step 6: Final answer
   x = 5,075.45