Finding the Fourth Proportional to 1,970.71, 2,719.58 and 1,086.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.71 : 2,719.58 = 1,086.59 : x
2. Step 2: Convert to fraction form
   1,970.71/2,719.58 = 1,086.59/x
3. Step 3: Cross multiply
   1,970.71x = 2,719.58 × 1,086.59
4. Step 4: Simplify right side
   1,970.71x = 2,955,068.43
5. Step 5: Solve for x
   x = 2,955,068.43/1,970.71
6. Step 6: Final answer
   x = 1,499.49