Finding the Fourth Proportional to 1,970.55, 2,719.32 and 1,086.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.55 : 2,719.32 = 1,086.43 : x
2. Step 2: Convert to fraction form
   1,970.55/2,719.32 = 1,086.43/x
3. Step 3: Cross multiply
   1,970.55x = 2,719.32 × 1,086.43
4. Step 4: Simplify right side
   1,970.55x = 2,954,345.40
5. Step 5: Solve for x
   x = 2,954,345.40/1,970.55
6. Step 6: Final answer
   x = 1,499.25