Finding the Fourth Proportional to 1,970.28, 2,718.90 and 1,086.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.28 : 2,718.90 = 1,086.07 : x
2. Step 2: Convert to fraction form
   1,970.28/2,718.90 = 1,086.07/x
3. Step 3: Cross multiply
   1,970.28x = 2,718.90 × 1,086.07
4. Step 4: Simplify right side
   1,970.28x = 2,952,915.72
5. Step 5: Solve for x
   x = 2,952,915.72/1,970.28
6. Step 6: Final answer
   x = 1,498.73