Finding the Fourth Proportional to 8,359.47, 12,551.49 and 3,980.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,359.47 : 12,551.49 = 3,980.07 : x
2. Step 2: Convert to fraction form
   8,359.47/12,551.49 = 3,980.07/x
3. Step 3: Cross multiply
   8,359.47x = 12,551.49 × 3,980.07
4. Step 4: Simplify right side
   8,359.47x = 49,955,808.80
5. Step 5: Solve for x
   x = 49,955,808.80/8,359.47
6. Step 6: Final answer
   x = 5,975.95