Finding the Fourth Proportional to 2,213.96, 3,321.34 and 1,393.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.96 : 3,321.34 = 1,393.22 : x
2. Step 2: Convert to fraction form
   2,213.96/3,321.34 = 1,393.22/x
3. Step 3: Cross multiply
   2,213.96x = 3,321.34 × 1,393.22
4. Step 4: Simplify right side
   2,213.96x = 4,627,362.14
5. Step 5: Solve for x
   x = 4,627,362.14/2,213.96
6. Step 6: Final answer
   x = 2,090.09