Finding the Fourth Proportional to 12,870.73, 19,269.69 and 8,179.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.73 : 19,269.69 = 8,179.11 : x
2. Step 2: Convert to fraction form
   12,870.73/19,269.69 = 8,179.11/x
3. Step 3: Cross multiply
   12,870.73x = 19,269.69 × 8,179.11
4. Step 4: Simplify right side
   12,870.73x = 157,608,914.18
5. Step 5: Solve for x
   x = 157,608,914.18/12,870.73
6. Step 6: Final answer
   x = 12,245.53