Finding the Fourth Proportional to 13,508.38, 18,641.61 and 7,539.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,508.38 : 18,641.61 = 7,539.94 : x
2. Step 2: Convert to fraction form
   13,508.38/18,641.61 = 7,539.94/x
3. Step 3: Cross multiply
   13,508.38x = 18,641.61 × 7,539.94
4. Step 4: Simplify right side
   13,508.38x = 140,556,620.90
5. Step 5: Solve for x
   x = 140,556,620.90/13,508.38
6. Step 6: Final answer
   x = 10,405.14