Finding the Fourth Proportional to 4,685.31, 7,018.25 and 2,222.10

Step by Step Solution

1. Step 1: Write the proportion equation
   4,685.31 : 7,018.25 = 2,222.10 : x
2. Step 2: Convert to fraction form
   4,685.31/7,018.25 = 2,222.10/x
3. Step 3: Cross multiply
   4,685.31x = 7,018.25 × 2,222.10
4. Step 4: Simplify right side
   4,685.31x = 15,595,242.21
5. Step 5: Solve for x
   x = 15,595,242.21/4,685.31
6. Step 6: Final answer
   x = 3,328.54