Finding the Fourth Proportional to 42,447.27, 63,684.69 and 20,257.77

Step by Step Solution

1. Step 1: Write the proportion equation
   42,447.27 : 63,684.69 = 20,257.77 : x
2. Step 2: Convert to fraction form
   42,447.27/63,684.69 = 20,257.77/x
3. Step 3: Cross multiply
   42,447.27x = 63,684.69 × 20,257.77
4. Step 4: Simplify right side
   42,447.27x = 1,290,109,802.54
5. Step 5: Solve for x
   x = 1,290,109,802.54/42,447.27
6. Step 6: Final answer
   x = 30,393.23