Finding the Fourth Proportional to 2,621.50, 3,618.36 and 1,574.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.50 : 3,618.36 = 1,574.20 : x
2. Step 2: Convert to fraction form
   2,621.50/3,618.36 = 1,574.20/x
3. Step 3: Cross multiply
   2,621.50x = 3,618.36 × 1,574.20
4. Step 4: Simplify right side
   2,621.50x = 5,696,022.31
5. Step 5: Solve for x
   x = 5,696,022.31/2,621.50
6. Step 6: Final answer
   x = 2,172.81