Finding the Fourth Proportional to 42,525.12, 63,768.48 and 12,946.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,525.12 : 63,768.48 = 12,946.56 : x
2. Step 2: Convert to fraction form
   42,525.12/63,768.48 = 12,946.56/x
3. Step 3: Cross multiply
   42,525.12x = 63,768.48 × 12,946.56
4. Step 4: Simplify right side
   42,525.12x = 825,582,452.43
5. Step 5: Solve for x
   x = 825,582,452.43/42,525.12
6. Step 6: Final answer
   x = 19,413.99