Finding the Fourth Proportional to 9,137.72, 13,626.35 and 9,054.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,137.72 : 13,626.35 = 9,054.56 : x
2. Step 2: Convert to fraction form
   9,137.72/13,626.35 = 9,054.56/x
3. Step 3: Cross multiply
   9,137.72x = 13,626.35 × 9,054.56
4. Step 4: Simplify right side
   9,137.72x = 123,380,603.66
5. Step 5: Solve for x
   x = 123,380,603.66/9,137.72
6. Step 6: Final answer
   x = 13,502.34