Finding the Fourth Proportional to 42,814.63, 64,240.39 and 17,859.59

Step by Step Solution

1. Step 1: Write the proportion equation
   42,814.63 : 64,240.39 = 17,859.59 : x
2. Step 2: Convert to fraction form
   42,814.63/64,240.39 = 17,859.59/x
3. Step 3: Cross multiply
   42,814.63x = 64,240.39 × 17,859.59
4. Step 4: Simplify right side
   42,814.63x = 1,147,306,968.86
5. Step 5: Solve for x
   x = 1,147,306,968.86/42,814.63
6. Step 6: Final answer
   x = 26,797.08