Finding the Fourth Proportional to 8,280.78, 12,406.59 and 7,376.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,280.78 : 12,406.59 = 7,376.82 : x
2. Step 2: Convert to fraction form
   8,280.78/12,406.59 = 7,376.82/x
3. Step 3: Cross multiply
   8,280.78x = 12,406.59 × 7,376.82
4. Step 4: Simplify right side
   8,280.78x = 91,521,181.24
5. Step 5: Solve for x
   x = 91,521,181.24/8,280.78
6. Step 6: Final answer
   x = 11,052.24