Finding the Fourth Proportional to 2,621.88, 3,618.54 and 1,574.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.88 : 3,618.54 = 1,574.01 : x
2. Step 2: Convert to fraction form
   2,621.88/3,618.54 = 1,574.01/x
3. Step 3: Cross multiply
   2,621.88x = 3,618.54 × 1,574.01
4. Step 4: Simplify right side
   2,621.88x = 5,695,618.15
5. Step 5: Solve for x
   x = 5,695,618.15/2,621.88
6. Step 6: Final answer
   x = 2,172.34