Finding the Fourth Proportional to 1,992.31, 2,748.66 and 1,206.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,992.31 : 2,748.66 = 1,206.07 : x
2. Step 2: Convert to fraction form
   1,992.31/2,748.66 = 1,206.07/x
3. Step 3: Cross multiply
   1,992.31x = 2,748.66 × 1,206.07
4. Step 4: Simplify right side
   1,992.31x = 3,315,076.37
5. Step 5: Solve for x
   x = 3,315,076.37/1,992.31
6. Step 6: Final answer
   x = 1,663.94