Finding the Fourth Proportional to 9,945.16, 14,977.34 and 9,059.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.16 : 14,977.34 = 9,059.42 : x
2. Step 2: Convert to fraction form
   9,945.16/14,977.34 = 9,059.42/x
3. Step 3: Cross multiply
   9,945.16x = 14,977.34 × 9,059.42
4. Step 4: Simplify right side
   9,945.16x = 135,686,013.54
5. Step 5: Solve for x
   x = 135,686,013.54/9,945.16
6. Step 6: Final answer
   x = 13,643.42