Finding the Fourth Proportional to 8,713.84, 13,072.56 and 3,520.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,713.84 : 13,072.56 = 3,520.12 : x
2. Step 2: Convert to fraction form
   8,713.84/13,072.56 = 3,520.12/x
3. Step 3: Cross multiply
   8,713.84x = 13,072.56 × 3,520.12
4. Step 4: Simplify right side
   8,713.84x = 46,016,979.91
5. Step 5: Solve for x
   x = 46,016,979.91/8,713.84
6. Step 6: Final answer
   x = 5,280.91