Finding the Fourth Proportional to 2,640.04, 3,643.10 and 1,445

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.04 : 3,643.10 = 1,445 : x
2. Step 2: Convert to fraction form
   2,640.04/3,643.10 = 1,445/x
3. Step 3: Cross multiply
   2,640.04x = 3,643.10 × 1,445
4. Step 4: Simplify right side
   2,640.04x = 5,264,279.50
5. Step 5: Solve for x
   x = 5,264,279.50/2,640.04
6. Step 6: Final answer
   x = 1,994.02