Finding the Fourth Proportional to 7,111.95, 9,811.45 and 5,220.27

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.95 : 9,811.45 = 5,220.27 : x
2. Step 2: Convert to fraction form
   7,111.95/9,811.45 = 5,220.27/x
3. Step 3: Cross multiply
   7,111.95x = 9,811.45 × 5,220.27
4. Step 4: Simplify right side
   7,111.95x = 51,218,466.89
5. Step 5: Solve for x
   x = 51,218,466.89/7,111.95
6. Step 6: Final answer
   x = 7,201.75