Finding the Fourth Proportional to 9,054.32, 12,495.87 and 5,519.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,054.32 : 12,495.87 = 5,519.61 : x
2. Step 2: Convert to fraction form
   9,054.32/12,495.87 = 5,519.61/x
3. Step 3: Cross multiply
   9,054.32x = 12,495.87 × 5,519.61
4. Step 4: Simplify right side
   9,054.32x = 68,972,329.01
5. Step 5: Solve for x
   x = 68,972,329.01/9,054.32
6. Step 6: Final answer
   x = 7,617.62