Finding the Fourth Proportional to 13,511, 18,644.82 and 7,542.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,511 : 18,644.82 = 7,542.50 : x
2. Step 2: Convert to fraction form
   13,511/18,644.82 = 7,542.50/x
3. Step 3: Cross multiply
   13,511x = 18,644.82 × 7,542.50
4. Step 4: Simplify right side
   13,511x = 140,628,554.85
5. Step 5: Solve for x
   x = 140,628,554.85/13,511
6. Step 6: Final answer
   x = 10,408.45