Finding the Fourth Proportional to 42,859.35, 64,299.29 and 17,885.51

Step by Step Solution

1. Step 1: Write the proportion equation
   42,859.35 : 64,299.29 = 17,885.51 : x
2. Step 2: Convert to fraction form
   42,859.35/64,299.29 = 17,885.51/x
3. Step 3: Cross multiply
   42,859.35x = 64,299.29 × 17,885.51
4. Step 4: Simplify right side
   42,859.35x = 1,150,025,594.29
5. Step 5: Solve for x
   x = 1,150,025,594.29/42,859.35
6. Step 6: Final answer
   x = 26,832.55