Finding the Fourth Proportional to 8,173.31, 12,263.40 and 5,543.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,173.31 : 12,263.40 = 5,543.78 : x
2. Step 2: Convert to fraction form
   8,173.31/12,263.40 = 5,543.78/x
3. Step 3: Cross multiply
   8,173.31x = 12,263.40 × 5,543.78
4. Step 4: Simplify right side
   8,173.31x = 67,985,530.34
5. Step 5: Solve for x
   x = 67,985,530.34/8,173.31
6. Step 6: Final answer
   x = 8,318.00