Finding the Fourth Proportional to 42,385.38, 63,579.15 and 12,804.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,385.38 : 63,579.15 = 12,804.18 : x
2. Step 2: Convert to fraction form
   42,385.38/63,579.15 = 12,804.18/x
3. Step 3: Cross multiply
   42,385.38x = 63,579.15 × 12,804.18
4. Step 4: Simplify right side
   42,385.38x = 814,078,880.85
5. Step 5: Solve for x
   x = 814,078,880.85/42,385.38
6. Step 6: Final answer
   x = 19,206.60