Finding the Fourth Proportional to 2,621.10, 3,923.55 and 1,522.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.10 : 3,923.55 = 1,522.20 : x
2. Step 2: Convert to fraction form
   2,621.10/3,923.55 = 1,522.20/x
3. Step 3: Cross multiply
   2,621.10x = 3,923.55 × 1,522.20
4. Step 4: Simplify right side
   2,621.10x = 5,972,427.81
5. Step 5: Solve for x
   x = 5,972,427.81/2,621.10
6. Step 6: Final answer
   x = 2,278.60