Finding the Fourth Proportional to 12,179.31, 16,782.34 and 9,346.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,179.31 : 16,782.34 = 9,346.56 : x
2. Step 2: Convert to fraction form
   12,179.31/16,782.34 = 9,346.56/x
3. Step 3: Cross multiply
   12,179.31x = 16,782.34 × 9,346.56
4. Step 4: Simplify right side
   12,179.31x = 156,857,147.75
5. Step 5: Solve for x
   x = 156,857,147.75/12,179.31
6. Step 6: Final answer
   x = 12,878.98