Finding the Fourth Proportional to 12,385.10, 18,573.30 and 7,936.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,385.10 : 18,573.30 = 7,936.38 : x
2. Step 2: Convert to fraction form
   12,385.10/18,573.30 = 7,936.38/x
3. Step 3: Cross multiply
   12,385.10x = 18,573.30 × 7,936.38
4. Step 4: Simplify right side
   12,385.10x = 147,404,766.65
5. Step 5: Solve for x
   x = 147,404,766.65/12,385.10
6. Step 6: Final answer
   x = 11,901.78