Finding the Fourth Proportional to 1,970.67, 2,719.49 and 1,086.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.67 : 2,719.49 = 1,086.56 : x
2. Step 2: Convert to fraction form
   1,970.67/2,719.49 = 1,086.56/x
3. Step 3: Cross multiply
   1,970.67x = 2,719.49 × 1,086.56
4. Step 4: Simplify right side
   1,970.67x = 2,954,875.46
5. Step 5: Solve for x
   x = 2,954,875.46/1,970.67
6. Step 6: Final answer
   x = 1,499.43