Finding the Fourth Proportional to 12,180.31, 16,783.72 and 9,347.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,180.31 : 16,783.72 = 9,347.56 : x
2. Step 2: Convert to fraction form
   12,180.31/16,783.72 = 9,347.56/x
3. Step 3: Cross multiply
   12,180.31x = 16,783.72 × 9,347.56
4. Step 4: Simplify right side
   12,180.31x = 156,886,829.72
5. Step 5: Solve for x
   x = 156,886,829.72/12,180.31
6. Step 6: Final answer
   x = 12,880.36