Finding the Fourth Proportional to 42,403.07, 63,589.72 and 12,409.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42,403.07 : 63,589.72 = 12,409.02 : x
2. Step 2: Convert to fraction form
   42,403.07/63,589.72 = 12,409.02/x
3. Step 3: Cross multiply
   42,403.07x = 63,589.72 × 12,409.02
4. Step 4: Simplify right side
   42,403.07x = 789,086,107.27
5. Step 5: Solve for x
   x = 789,086,107.27/42,403.07
6. Step 6: Final answer
   x = 18,609.17