Finding the Fourth Proportional to 2,390.12, 3,580.78 and 1,522.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.12 : 3,580.78 = 1,522.60 : x
2. Step 2: Convert to fraction form
   2,390.12/3,580.78 = 1,522.60/x
3. Step 3: Cross multiply
   2,390.12x = 3,580.78 × 1,522.60
4. Step 4: Simplify right side
   2,390.12x = 5,452,095.63
5. Step 5: Solve for x
   x = 5,452,095.63/2,390.12
6. Step 6: Final answer
   x = 2,281.10