Finding the Fourth Proportional to 1,970.31, 2,718.99 and 1,086.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.31 : 2,718.99 = 1,086.12 : x
2. Step 2: Convert to fraction form
   1,970.31/2,718.99 = 1,086.12/x
3. Step 3: Cross multiply
   1,970.31x = 2,718.99 × 1,086.12
4. Step 4: Simplify right side
   1,970.31x = 2,953,149.42
5. Step 5: Solve for x
   x = 2,953,149.42/1,970.31
6. Step 6: Final answer
   x = 1,498.82