Finding the Fourth Proportional to 42,019.91, 63,039.59 and 18,648.17

Step by Step Solution

1. Step 1: Write the proportion equation
   42,019.91 : 63,039.59 = 18,648.17 : x
2. Step 2: Convert to fraction form
   42,019.91/63,039.59 = 18,648.17/x
3. Step 3: Cross multiply
   42,019.91x = 63,039.59 × 18,648.17
4. Step 4: Simplify right side
   42,019.91x = 1,175,572,991.05
5. Step 5: Solve for x
   x = 1,175,572,991.05/42,019.91
6. Step 6: Final answer
   x = 27,976.57