Finding the Fourth Proportional to 42,379.50, 63,569.71 and 12,797.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,379.50 : 63,569.71 = 12,797.60 : x
2. Step 2: Convert to fraction form
   42,379.50/63,569.71 = 12,797.60/x
3. Step 3: Cross multiply
   42,379.50x = 63,569.71 × 12,797.60
4. Step 4: Simplify right side
   42,379.50x = 813,539,418.84
5. Step 5: Solve for x
   x = 813,539,418.84/42,379.50
6. Step 6: Final answer
   x = 19,196.53