Finding the Fourth Proportional to 9,054.95, 12,495.81 and 5,518.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,054.95 : 12,495.81 = 5,518.15 : x
2. Step 2: Convert to fraction form
   9,054.95/12,495.81 = 5,518.15/x
3. Step 3: Cross multiply
   9,054.95x = 12,495.81 × 5,518.15
4. Step 4: Simplify right side
   9,054.95x = 68,953,753.95
5. Step 5: Solve for x
   x = 68,953,753.95/9,054.95
6. Step 6: Final answer
   x = 7,615.04