Finding the Fourth Proportional to 9,072.73, 12,521.74 and 5,538

Step by Step Solution

1. Step 1: Write the proportion equation
   9,072.73 : 12,521.74 = 5,538 : x
2. Step 2: Convert to fraction form
   9,072.73/12,521.74 = 5,538/x
3. Step 3: Cross multiply
   9,072.73x = 12,521.74 × 5,538
4. Step 4: Simplify right side
   9,072.73x = 69,345,396.12
5. Step 5: Solve for x
   x = 69,345,396.12/9,072.73
6. Step 6: Final answer
   x = 7,643.28