Finding the Fourth Proportional to 2,406.20, 3,307.69 and 2,168.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,406.20 : 3,307.69 = 2,168.60 : x
2. Step 2: Convert to fraction form
   2,406.20/3,307.69 = 2,168.60/x
3. Step 3: Cross multiply
   2,406.20x = 3,307.69 × 2,168.60
4. Step 4: Simplify right side
   2,406.20x = 7,173,056.53
5. Step 5: Solve for x
   x = 7,173,056.53/2,406.20
6. Step 6: Final answer
   x = 2,981.07