Finding the Fourth Proportional to 8,387.34, 12,580.98 and 2,147.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,387.34 : 12,580.98 = 2,147.34 : x
2. Step 2: Convert to fraction form
   8,387.34/12,580.98 = 2,147.34/x
3. Step 3: Cross multiply
   8,387.34x = 12,580.98 × 2,147.34
4. Step 4: Simplify right side
   8,387.34x = 27,015,641.59
5. Step 5: Solve for x
   x = 27,015,641.59/8,387.34
6. Step 6: Final answer
   x = 3,221.00