Finding the Fourth Proportional to 9,118.53, 12,583.22 and 5,139.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,118.53 : 12,583.22 = 5,139.54 : x
2. Step 2: Convert to fraction form
   9,118.53/12,583.22 = 5,139.54/x
3. Step 3: Cross multiply
   9,118.53x = 12,583.22 × 5,139.54
4. Step 4: Simplify right side
   9,118.53x = 64,671,936.82
5. Step 5: Solve for x
   x = 64,671,936.82/9,118.53
6. Step 6: Final answer
   x = 7,092.36