Finding the Fourth Proportional to 42,863.48, 64,305.42 and 17,889.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,863.48 : 64,305.42 = 17,889.62 : x
2. Step 2: Convert to fraction form
   42,863.48/64,305.42 = 17,889.62/x
3. Step 3: Cross multiply
   42,863.48x = 64,305.42 × 17,889.62
4. Step 4: Simplify right side
   42,863.48x = 1,150,399,527.74
5. Step 5: Solve for x
   x = 1,150,399,527.74/42,863.48
6. Step 6: Final answer
   x = 26,838.69