Finding the Fourth Proportional to 13,511.72, 18,645.86 and 7,543.95

Step by Step Solution

1. Step 1: Write the proportion equation
   13,511.72 : 18,645.86 = 7,543.95 : x
2. Step 2: Convert to fraction form
   13,511.72/18,645.86 = 7,543.95/x
3. Step 3: Cross multiply
   13,511.72x = 18,645.86 × 7,543.95
4. Step 4: Simplify right side
   13,511.72x = 140,663,397.83
5. Step 5: Solve for x
   x = 140,663,397.83/13,511.72
6. Step 6: Final answer
   x = 10,410.48