Finding the Fourth Proportional to 1,970.62, 2,719.56 and 1,086.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.62 : 2,719.56 = 1,086.42 : x
2. Step 2: Convert to fraction form
   1,970.62/2,719.56 = 1,086.42/x
3. Step 3: Cross multiply
   1,970.62x = 2,719.56 × 1,086.42
4. Step 4: Simplify right side
   1,970.62x = 2,954,580.30
5. Step 5: Solve for x
   x = 2,954,580.30/1,970.62
6. Step 6: Final answer
   x = 1,499.32