Finding the Fourth Proportional to 1,970.95, 2,719.81 and 1,086.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.95 : 2,719.81 = 1,086.60 : x
2. Step 2: Convert to fraction form
   1,970.95/2,719.81 = 1,086.60/x
3. Step 3: Cross multiply
   1,970.95x = 2,719.81 × 1,086.60
4. Step 4: Simplify right side
   1,970.95x = 2,955,345.55
5. Step 5: Solve for x
   x = 2,955,345.55/1,970.95
6. Step 6: Final answer
   x = 1,499.45