Finding the Fourth Proportional to 1,622.40, 2,418.16 and 1,530.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,622.40 : 2,418.16 = 1,530.12 : x
2. Step 2: Convert to fraction form
   1,622.40/2,418.16 = 1,530.12/x
3. Step 3: Cross multiply
   1,622.40x = 2,418.16 × 1,530.12
4. Step 4: Simplify right side
   1,622.40x = 3,700,067.33
5. Step 5: Solve for x
   x = 3,700,067.33/1,622.40
6. Step 6: Final answer
   x = 2,280.62