Finding the Fourth Proportional to 42,863.35, 64,305.29 and 17,889.51

Step by Step Solution

1. Step 1: Write the proportion equation
   42,863.35 : 64,305.29 = 17,889.51 : x
2. Step 2: Convert to fraction form
   42,863.35/64,305.29 = 17,889.51/x
3. Step 3: Cross multiply
   42,863.35x = 64,305.29 × 17,889.51
4. Step 4: Simplify right side
   42,863.35x = 1,150,390,128.51
5. Step 5: Solve for x
   x = 1,150,390,128.51/42,863.35
6. Step 6: Final answer
   x = 26,838.55