Finding the Fourth Proportional to 42,435.86, 63,661.53 and 13,974.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,435.86 : 63,661.53 = 13,974.42 : x
2. Step 2: Convert to fraction form
   42,435.86/63,661.53 = 13,974.42/x
3. Step 3: Cross multiply
   42,435.86x = 63,661.53 × 13,974.42
4. Step 4: Simplify right side
   42,435.86x = 889,632,958.06
5. Step 5: Solve for x
   x = 889,632,958.06/42,435.86
6. Step 6: Final answer
   x = 20,964.18