Finding the Fourth Proportional to 42,426, 63,640.56 and 12,846.24

Step by Step Solution

1. Step 1: Write the proportion equation
   42,426 : 63,640.56 = 12,846.24 : x
2. Step 2: Convert to fraction form
   42,426/63,640.56 = 12,846.24/x
3. Step 3: Cross multiply
   42,426x = 63,640.56 × 12,846.24
4. Step 4: Simplify right side
   42,426x = 817,541,907.49
5. Step 5: Solve for x
   x = 817,541,907.49/42,426
6. Step 6: Final answer
   x = 19,269.83