Finding the Fourth Proportional to 2,621.90, 3,618.06 and 1,574.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.90 : 3,618.06 = 1,574.54 : x
2. Step 2: Convert to fraction form
   2,621.90/3,618.06 = 1,574.54/x
3. Step 3: Cross multiply
   2,621.90x = 3,618.06 × 1,574.54
4. Step 4: Simplify right side
   2,621.90x = 5,696,780.19
5. Step 5: Solve for x
   x = 5,696,780.19/2,621.90
6. Step 6: Final answer
   x = 2,172.77