Finding the Fourth Proportional to 1,970.57, 2,719.39 and 1,086.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.57 : 2,719.39 = 1,086.37 : x
2. Step 2: Convert to fraction form
   1,970.57/2,719.39 = 1,086.37/x
3. Step 3: Cross multiply
   1,970.57x = 2,719.39 × 1,086.37
4. Step 4: Simplify right side
   1,970.57x = 2,954,254.20
5. Step 5: Solve for x
   x = 2,954,254.20/1,970.57
6. Step 6: Final answer
   x = 1,499.19