Finding the Fourth Proportional to 42,688.52, 64,040.98 and 16,391.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,688.52 : 64,040.98 = 16,391.18 : x
2. Step 2: Convert to fraction form
   42,688.52/64,040.98 = 16,391.18/x
3. Step 3: Cross multiply
   42,688.52x = 64,040.98 × 16,391.18
4. Step 4: Simplify right side
   42,688.52x = 1,049,707,230.56
5. Step 5: Solve for x
   x = 1,049,707,230.56/42,688.52
6. Step 6: Final answer
   x = 24,589.92