Finding the Fourth Proportional to 42,768.17, 64,104.45 and 17,791.22

Step by Step Solution

1. Step 1: Write the proportion equation
   42,768.17 : 64,104.45 = 17,791.22 : x
2. Step 2: Convert to fraction form
   42,768.17/64,104.45 = 17,791.22/x
3. Step 3: Cross multiply
   42,768.17x = 64,104.45 × 17,791.22
4. Step 4: Simplify right side
   42,768.17x = 1,140,496,052.41
5. Step 5: Solve for x
   x = 1,140,496,052.41/42,768.17
6. Step 6: Final answer
   x = 26,666.94