Finding the Fourth Proportional to 42,417.41, 63,617.85 and 12,828.29

Step by Step Solution

1. Step 1: Write the proportion equation
   42,417.41 : 63,617.85 = 12,828.29 : x
2. Step 2: Convert to fraction form
   42,417.41/63,617.85 = 12,828.29/x
3. Step 3: Cross multiply
   42,417.41x = 63,617.85 × 12,828.29
4. Step 4: Simplify right side
   42,417.41x = 816,107,910.89
5. Step 5: Solve for x
   x = 816,107,910.89/42,417.41
6. Step 6: Final answer
   x = 19,239.93