Finding the Fourth Proportional to 2,564.65, 3,539.24 and 1,445.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,564.65 : 3,539.24 = 1,445.55 : x
2. Step 2: Convert to fraction form
   2,564.65/3,539.24 = 1,445.55/x
3. Step 3: Cross multiply
   2,564.65x = 3,539.24 × 1,445.55
4. Step 4: Simplify right side
   2,564.65x = 5,116,148.38
5. Step 5: Solve for x
   x = 5,116,148.38/2,564.65
6. Step 6: Final answer
   x = 1,994.87