Finding the Fourth Proportional to 8,099.82, 12,128.69 and 6,937.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,099.82 : 12,128.69 = 6,937.30 : x
2. Step 2: Convert to fraction form
   8,099.82/12,128.69 = 6,937.30/x
3. Step 3: Cross multiply
   8,099.82x = 12,128.69 × 6,937.30
4. Step 4: Simplify right side
   8,099.82x = 84,140,361.14
5. Step 5: Solve for x
   x = 84,140,361.14/8,099.82
6. Step 6: Final answer
   x = 10,387.93