Finding the Fourth Proportional to 12,179.76, 18,275.40 and 8,437.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,179.76 : 18,275.40 = 8,437.30 : x
2. Step 2: Convert to fraction form
   12,179.76/18,275.40 = 8,437.30/x
3. Step 3: Cross multiply
   12,179.76x = 18,275.40 × 8,437.30
4. Step 4: Simplify right side
   12,179.76x = 154,195,018.37
5. Step 5: Solve for x
   x = 154,195,018.37/12,179.76
6. Step 6: Final answer
   x = 12,659.94