Finding the Fourth Proportional to 42,016.42, 63,006.15 and 12,436.54

Step by Step Solution

1. Step 1: Write the proportion equation
   42,016.42 : 63,006.15 = 12,436.54 : x
2. Step 2: Convert to fraction form
   42,016.42/63,006.15 = 12,436.54/x
3. Step 3: Cross multiply
   42,016.42x = 63,006.15 × 12,436.54
4. Step 4: Simplify right side
   42,016.42x = 783,578,504.72
5. Step 5: Solve for x
   x = 783,578,504.72/42,016.42
6. Step 6: Final answer
   x = 18,649.34