Finding the Fourth Proportional to 42,445.29, 63,684.33 and 12,863.37

Step by Step Solution

1. Step 1: Write the proportion equation
   42,445.29 : 63,684.33 = 12,863.37 : x
2. Step 2: Convert to fraction form
   42,445.29/63,684.33 = 12,863.37/x
3. Step 3: Cross multiply
   42,445.29x = 63,684.33 × 12,863.37
4. Step 4: Simplify right side
   42,445.29x = 819,195,099.99
5. Step 5: Solve for x
   x = 819,195,099.99/42,445.29
6. Step 6: Final answer
   x = 19,300.02