Finding the Fourth Proportional to 13,511.34, 18,645.33 and 7,543.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,511.34 : 18,645.33 = 7,543.56 : x
2. Step 2: Convert to fraction form
   13,511.34/18,645.33 = 7,543.56/x
3. Step 3: Cross multiply
   13,511.34x = 18,645.33 × 7,543.56
4. Step 4: Simplify right side
   13,511.34x = 140,652,263.78
5. Step 5: Solve for x
   x = 140,652,263.78/13,511.34
6. Step 6: Final answer
   x = 10,409.94