Finding the Fourth Proportional to 13,559.12, 18,711.24 and 7,590.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,559.12 : 18,711.24 = 7,590.50 : x
2. Step 2: Convert to fraction form
   13,559.12/18,711.24 = 7,590.50/x
3. Step 3: Cross multiply
   13,559.12x = 18,711.24 × 7,590.50
4. Step 4: Simplify right side
   13,559.12x = 142,027,667.22
5. Step 5: Solve for x
   x = 142,027,667.22/13,559.12
6. Step 6: Final answer
   x = 10,474.70