Finding the Fourth Proportional to 40,661.10, 60,969.18 and 12,573.42

Step by Step Solution

1. Step 1: Write the proportion equation
   40,661.10 : 60,969.18 = 12,573.42 : x
2. Step 2: Convert to fraction form
   40,661.10/60,969.18 = 12,573.42/x
3. Step 3: Cross multiply
   40,661.10x = 60,969.18 × 12,573.42
4. Step 4: Simplify right side
   40,661.10x = 766,591,107.20
5. Step 5: Solve for x
   x = 766,591,107.20/40,661.10
6. Step 6: Final answer
   x = 18,853.18