Finding the Fourth Proportional to 2,421.12, 3,340.56 and 1,536.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,421.12 : 3,340.56 = 1,536.60 : x
2. Step 2: Convert to fraction form
   2,421.12/3,340.56 = 1,536.60/x
3. Step 3: Cross multiply
   2,421.12x = 3,340.56 × 1,536.60
4. Step 4: Simplify right side
   2,421.12x = 5,133,104.50
5. Step 5: Solve for x
   x = 5,133,104.50/2,421.12
6. Step 6: Final answer
   x = 2,120.14