Finding the Fourth Proportional to 8,547.21, 12,812.00 and 3,280.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,547.21 : 12,812.00 = 3,280.82 : x
2. Step 2: Convert to fraction form
   8,547.21/12,812.00 = 3,280.82/x
3. Step 3: Cross multiply
   8,547.21x = 12,812.00 × 3,280.82
4. Step 4: Simplify right side
   8,547.21x = 42,033,785.38
5. Step 5: Solve for x
   x = 42,033,785.38/8,547.21
6. Step 6: Final answer
   x = 4,917.84