Finding the Fourth Proportional to 2,151.09, 2,968.56 and 1,206.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.09 : 2,968.56 = 1,206.86 : x
2. Step 2: Convert to fraction form
   2,151.09/2,968.56 = 1,206.86/x
3. Step 3: Cross multiply
   2,151.09x = 2,968.56 × 1,206.86
4. Step 4: Simplify right side
   2,151.09x = 3,582,621.48
5. Step 5: Solve for x
   x = 3,582,621.48/2,151.09
6. Step 6: Final answer
   x = 1,665.49