Finding the Fourth Proportional to 8,681.85, 12,992.00 and 5,396.49

Step by Step Solution

1. Step 1: Write the proportion equation
   8,681.85 : 12,992.00 = 5,396.49 : x
2. Step 2: Convert to fraction form
   8,681.85/12,992.00 = 5,396.49/x
3. Step 3: Cross multiply
   8,681.85x = 12,992.00 × 5,396.49
4. Step 4: Simplify right side
   8,681.85x = 70,111,171.10
5. Step 5: Solve for x
   x = 70,111,171.10/8,681.85
6. Step 6: Final answer
   x = 8,075.60