Finding the Fourth Proportional to 2,140.37, 3,209.00 and 1,445.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.37 : 3,209.00 = 1,445.31 : x
2. Step 2: Convert to fraction form
   2,140.37/3,209.00 = 1,445.31/x
3. Step 3: Cross multiply
   2,140.37x = 3,209.00 × 1,445.31
4. Step 4: Simplify right side
   2,140.37x = 4,638,010.02
5. Step 5: Solve for x
   x = 4,638,010.02/2,140.37
6. Step 6: Final answer
   x = 2,166.92