Finding the Fourth Proportional to 3,645.33, 5,030.22 and 2,153.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,645.33 : 5,030.22 = 2,153.31 : x
2. Step 2: Convert to fraction form
   3,645.33/5,030.22 = 2,153.31/x
3. Step 3: Cross multiply
   3,645.33x = 5,030.22 × 2,153.31
4. Step 4: Simplify right side
   3,645.33x = 10,831,623.03
5. Step 5: Solve for x
   x = 10,831,623.03/3,645.33
6. Step 6: Final answer
   x = 2,971.37