Finding the Fourth Proportional to 42,986.37, 64,481.30 and 10,966.29

Step by Step Solution

1. Step 1: Write the proportion equation
   42,986.37 : 64,481.30 = 10,966.29 : x
2. Step 2: Convert to fraction form
   42,986.37/64,481.30 = 10,966.29/x
3. Step 3: Cross multiply
   42,986.37x = 64,481.30 × 10,966.29
4. Step 4: Simplify right side
   42,986.37x = 707,120,635.38
5. Step 5: Solve for x
   x = 707,120,635.38/42,986.37
6. Step 6: Final answer
   x = 16,449.88