Finding the Fourth Proportional to 42,689.91, 64,053.33 and 16,388.54

Step by Step Solution

1. Step 1: Write the proportion equation
   42,689.91 : 64,053.33 = 16,388.54 : x
2. Step 2: Convert to fraction form
   42,689.91/64,053.33 = 16,388.54/x
3. Step 3: Cross multiply
   42,689.91x = 64,053.33 × 16,388.54
4. Step 4: Simplify right side
   42,689.91x = 1,049,740,560.84
5. Step 5: Solve for x
   x = 1,049,740,560.84/42,689.91
6. Step 6: Final answer
   x = 24,589.90