Finding the Fourth Proportional to 42,867.40, 64,311.23 and 17,893.57

Step by Step Solution

1. Step 1: Write the proportion equation
   42,867.40 : 64,311.23 = 17,893.57 : x
2. Step 2: Convert to fraction form
   42,867.40/64,311.23 = 17,893.57/x
3. Step 3: Cross multiply
   42,867.40x = 64,311.23 × 17,893.57
4. Step 4: Simplify right side
   42,867.40x = 1,150,757,495.79
5. Step 5: Solve for x
   x = 1,150,757,495.79/42,867.40
6. Step 6: Final answer
   x = 26,844.58