Finding the Fourth Proportional to 8,173.03, 12,261.37 and 2,978.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,173.03 : 12,261.37 = 2,978.91 : x
2. Step 2: Convert to fraction form
   8,173.03/12,261.37 = 2,978.91/x
3. Step 3: Cross multiply
   8,173.03x = 12,261.37 × 2,978.91
4. Step 4: Simplify right side
   8,173.03x = 36,525,469.86
5. Step 5: Solve for x
   x = 36,525,469.86/8,173.03
6. Step 6: Final answer
   x = 4,469.02