Finding the Fourth Proportional to 13,559.34, 18,711.54 and 7,590.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,559.34 : 18,711.54 = 7,590.54 : x
2. Step 2: Convert to fraction form
   13,559.34/18,711.54 = 7,590.54/x
3. Step 3: Cross multiply
   13,559.34x = 18,711.54 × 7,590.54
4. Step 4: Simplify right side
   13,559.34x = 142,030,692.83
5. Step 5: Solve for x
   x = 142,030,692.83/13,559.34
6. Step 6: Final answer
   x = 10,474.75