Finding the Fourth Proportional to 8,075.40, 12,116.16 and 3,915.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,075.40 : 12,116.16 = 3,915.18 : x
2. Step 2: Convert to fraction form
   8,075.40/12,116.16 = 3,915.18/x
3. Step 3: Cross multiply
   8,075.40x = 12,116.16 × 3,915.18
4. Step 4: Simplify right side
   8,075.40x = 47,436,947.31
5. Step 5: Solve for x
   x = 47,436,947.31/8,075.40
6. Step 6: Final answer
   x = 5,874.25