Finding the Fourth Proportional to 9,142.72, 13,633.80 and 9,059.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,142.72 : 13,633.80 = 9,059.56 : x
2. Step 2: Convert to fraction form
   9,142.72/13,633.80 = 9,059.56/x
3. Step 3: Cross multiply
   9,142.72x = 13,633.80 × 9,059.56
4. Step 4: Simplify right side
   9,142.72x = 123,516,229.13
5. Step 5: Solve for x
   x = 123,516,229.13/9,142.72
6. Step 6: Final answer
   x = 13,509.79