Finding the Fourth Proportional to 42,086.12, 63,141.78 and 12,504.92

Step by Step Solution

1. Step 1: Write the proportion equation
   42,086.12 : 63,141.78 = 12,504.92 : x
2. Step 2: Convert to fraction form
   42,086.12/63,141.78 = 12,504.92/x
3. Step 3: Cross multiply
   42,086.12x = 63,141.78 × 12,504.92
4. Step 4: Simplify right side
   42,086.12x = 789,582,907.56
5. Step 5: Solve for x
   x = 789,582,907.56/42,086.12
6. Step 6: Final answer
   x = 18,761.12