Finding the Fourth Proportional to 1,992.20, 2,748.72 and 1,206.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,992.20 : 2,748.72 = 1,206.08 : x
2. Step 2: Convert to fraction form
   1,992.20/2,748.72 = 1,206.08/x
3. Step 3: Cross multiply
   1,992.20x = 2,748.72 × 1,206.08
4. Step 4: Simplify right side
   1,992.20x = 3,315,176.22
5. Step 5: Solve for x
   x = 3,315,176.22/1,992.20
6. Step 6: Final answer
   x = 1,664.08