Finding the Fourth Proportional to 42,399.42, 63,600.48 and 21,327.96

Step by Step Solution

1. Step 1: Write the proportion equation
   42,399.42 : 63,600.48 = 21,327.96 : x
2. Step 2: Convert to fraction form
   42,399.42/63,600.48 = 21,327.96/x
3. Step 3: Cross multiply
   42,399.42x = 63,600.48 × 21,327.96
4. Step 4: Simplify right side
   42,399.42x = 1,356,468,493.42
5. Step 5: Solve for x
   x = 1,356,468,493.42/42,399.42
6. Step 6: Final answer
   x = 31,992.62