Finding the Fourth Proportional to 42,434.65, 63,662.78 and 19,940.95

Step by Step Solution

1. Step 1: Write the proportion equation
   42,434.65 : 63,662.78 = 19,940.95 : x
2. Step 2: Convert to fraction form
   42,434.65/63,662.78 = 19,940.95/x
3. Step 3: Cross multiply
   42,434.65x = 63,662.78 × 19,940.95
4. Step 4: Simplify right side
   42,434.65x = 1,269,496,622.95
5. Step 5: Solve for x
   x = 1,269,496,622.95/42,434.65
6. Step 6: Final answer
   x = 29,916.51