Finding the Fourth Proportional to 42,380.81, 63,569.34 and 12,797.73

Step by Step Solution

1. Step 1: Write the proportion equation
   42,380.81 : 63,569.34 = 12,797.73 : x
2. Step 2: Convert to fraction form
   42,380.81/63,569.34 = 12,797.73/x
3. Step 3: Cross multiply
   42,380.81x = 63,569.34 × 12,797.73
4. Step 4: Simplify right side
   42,380.81x = 813,543,249.60
5. Step 5: Solve for x
   x = 813,543,249.60/42,380.81
6. Step 6: Final answer
   x = 19,196.03