Finding the Fourth Proportional to 13,511.76, 18,646.25 and 7,543.43

Step by Step Solution

1. Step 1: Write the proportion equation
   13,511.76 : 18,646.25 = 7,543.43 : x
2. Step 2: Convert to fraction form
   13,511.76/18,646.25 = 7,543.43/x
3. Step 3: Cross multiply
   13,511.76x = 18,646.25 × 7,543.43
4. Step 4: Simplify right side
   13,511.76x = 140,656,550.69
5. Step 5: Solve for x
   x = 140,656,550.69/13,511.76
6. Step 6: Final answer
   x = 10,409.94