Finding the Fourth Proportional to 42,020.16, 63,039.96 and 18,648.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,020.16 : 63,039.96 = 18,648.42 : x
2. Step 2: Convert to fraction form
   42,020.16/63,039.96 = 18,648.42/x
3. Step 3: Cross multiply
   42,020.16x = 63,039.96 × 18,648.42
4. Step 4: Simplify right side
   42,020.16x = 1,175,595,650.86
5. Step 5: Solve for x
   x = 1,175,595,650.86/42,020.16
6. Step 6: Final answer
   x = 27,976.94