Finding the Fourth Proportional to 42,867.72, 64,320.02 and 23,142.36

Step by Step Solution

1. Step 1: Write the proportion equation
   42,867.72 : 64,320.02 = 23,142.36 : x
2. Step 2: Convert to fraction form
   42,867.72/64,320.02 = 23,142.36/x
3. Step 3: Cross multiply
   42,867.72x = 64,320.02 × 23,142.36
4. Step 4: Simplify right side
   42,867.72x = 1,488,517,058.05
5. Step 5: Solve for x
   x = 1,488,517,058.05/42,867.72
6. Step 6: Final answer
   x = 34,723.49