Finding the Fourth Proportional to 1,970.88, 2,719.94 and 1,086.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.88 : 2,719.94 = 1,086.69 : x
2. Step 2: Convert to fraction form
   1,970.88/2,719.94 = 1,086.69/x
3. Step 3: Cross multiply
   1,970.88x = 2,719.94 × 1,086.69
4. Step 4: Simplify right side
   1,970.88x = 2,955,731.60
5. Step 5: Solve for x
   x = 2,955,731.60/1,970.88
6. Step 6: Final answer
   x = 1,499.70