Finding the Fourth Proportional to 2,076.60, 3,111.30 and 1,306.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.60 : 3,111.30 = 1,306.20 : x
2. Step 2: Convert to fraction form
   2,076.60/3,111.30 = 1,306.20/x
3. Step 3: Cross multiply
   2,076.60x = 3,111.30 × 1,306.20
4. Step 4: Simplify right side
   2,076.60x = 4,063,980.06
5. Step 5: Solve for x
   x = 4,063,980.06/2,076.60
6. Step 6: Final answer
   x = 1,957.04