Finding the Fourth Proportional to 9,231.39, 12,736.55 and 5,454.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,231.39 : 12,736.55 = 5,454.90 : x
2. Step 2: Convert to fraction form
   9,231.39/12,736.55 = 5,454.90/x
3. Step 3: Cross multiply
   9,231.39x = 12,736.55 × 5,454.90
4. Step 4: Simplify right side
   9,231.39x = 69,476,579.32
5. Step 5: Solve for x
   x = 69,476,579.32/9,231.39
6. Step 6: Final answer
   x = 7,526.12