Finding the Fourth Proportional to 13,545.72, 18,693.10 and 7,577.39

Step by Step Solution

1. Step 1: Write the proportion equation
   13,545.72 : 18,693.10 = 7,577.39 : x
2. Step 2: Convert to fraction form
   13,545.72/18,693.10 = 7,577.39/x
3. Step 3: Cross multiply
   13,545.72x = 18,693.10 × 7,577.39
4. Step 4: Simplify right side
   13,545.72x = 141,644,870.02
5. Step 5: Solve for x
   x = 141,644,870.02/13,545.72
6. Step 6: Final answer
   x = 10,456.80