Finding the Fourth Proportional to 42,436.65, 63,665.78 and 19,942.96

Step by Step Solution

1. Step 1: Write the proportion equation
   42,436.65 : 63,665.78 = 19,942.96 : x
2. Step 2: Convert to fraction form
   42,436.65/63,665.78 = 19,942.96/x
3. Step 3: Cross multiply
   42,436.65x = 63,665.78 × 19,942.96
4. Step 4: Simplify right side
   42,436.65x = 1,269,684,153.77
5. Step 5: Solve for x
   x = 1,269,684,153.77/42,436.65
6. Step 6: Final answer
   x = 29,919.52