Finding the Fourth Proportional to 1,970.45, 2,719.20 and 1,086.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.45 : 2,719.20 = 1,086.29 : x
2. Step 2: Convert to fraction form
   1,970.45/2,719.20 = 1,086.29/x
3. Step 3: Cross multiply
   1,970.45x = 2,719.20 × 1,086.29
4. Step 4: Simplify right side
   1,970.45x = 2,953,839.77
5. Step 5: Solve for x
   x = 2,953,839.77/1,970.45
6. Step 6: Final answer
   x = 1,499.07