Finding the Fourth Proportional to 8,100.19, 12,122.73 and 4,978.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,100.19 : 12,122.73 = 4,978.55 : x
2. Step 2: Convert to fraction form
   8,100.19/12,122.73 = 4,978.55/x
3. Step 3: Cross multiply
   8,100.19x = 12,122.73 × 4,978.55
4. Step 4: Simplify right side
   8,100.19x = 60,353,617.44
5. Step 5: Solve for x
   x = 60,353,617.44/8,100.19
6. Step 6: Final answer
   x = 7,450.89