Finding the Fourth Proportional to 42,559.78, 63,848.82 and 21,224.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,559.78 : 63,848.82 = 21,224.12 : x
2. Step 2: Convert to fraction form
   42,559.78/63,848.82 = 21,224.12/x
3. Step 3: Cross multiply
   42,559.78x = 63,848.82 × 21,224.12
4. Step 4: Simplify right side
   42,559.78x = 1,355,135,017.54
5. Step 5: Solve for x
   x = 1,355,135,017.54/42,559.78
6. Step 6: Final answer
   x = 31,840.74