Finding the Fourth Proportional to 42,227.46, 63,315.60 and 21,142.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,227.46 : 63,315.60 = 21,142.98 : x
2. Step 2: Convert to fraction form
   42,227.46/63,315.60 = 21,142.98/x
3. Step 3: Cross multiply
   42,227.46x = 63,315.60 × 21,142.98
4. Step 4: Simplify right side
   42,227.46x = 1,338,680,464.49
5. Step 5: Solve for x
   x = 1,338,680,464.49/42,227.46
6. Step 6: Final answer
   x = 31,701.66