Finding the Fourth Proportional to 42,445.77, 63,668.73 and 12,863.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,445.77 : 63,668.73 = 12,863.86 : x
2. Step 2: Convert to fraction form
   42,445.77/63,668.73 = 12,863.86/x
3. Step 3: Cross multiply
   42,445.77x = 63,668.73 × 12,863.86
4. Step 4: Simplify right side
   42,445.77x = 819,025,876.30
5. Step 5: Solve for x
   x = 819,025,876.30/42,445.77
6. Step 6: Final answer
   x = 19,295.82