Finding the Fourth Proportional to 1,970.39, 2,719.10 and 1,086.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.39 : 2,719.10 = 1,086.18 : x
2. Step 2: Convert to fraction form
   1,970.39/2,719.10 = 1,086.18/x
3. Step 3: Cross multiply
   1,970.39x = 2,719.10 × 1,086.18
4. Step 4: Simplify right side
   1,970.39x = 2,953,424.56
5. Step 5: Solve for x
   x = 2,953,424.56/1,970.39
6. Step 6: Final answer
   x = 1,498.90