Finding the Fourth Proportional to 8,772.03, 12,105.11 and 5,543.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,772.03 : 12,105.11 = 5,543.57 : x
2. Step 2: Convert to fraction form
   8,772.03/12,105.11 = 5,543.57/x
3. Step 3: Cross multiply
   8,772.03x = 12,105.11 × 5,543.57
4. Step 4: Simplify right side
   8,772.03x = 67,105,486.77
5. Step 5: Solve for x
   x = 67,105,486.77/8,772.03
6. Step 6: Final answer
   x = 7,649.94