Finding the Fourth Proportional to 42,406.56, 63,621.36 and 12,825.36

Step by Step Solution

1. Step 1: Write the proportion equation
   42,406.56 : 63,621.36 = 12,825.36 : x
2. Step 2: Convert to fraction form
   42,406.56/63,621.36 = 12,825.36/x
3. Step 3: Cross multiply
   42,406.56x = 63,621.36 × 12,825.36
4. Step 4: Simplify right side
   42,406.56x = 815,966,845.69
5. Step 5: Solve for x
   x = 815,966,845.69/42,406.56
6. Step 6: Final answer
   x = 19,241.52