Finding the Fourth Proportional to 2,106.52, 3,159.59 and 719.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.52 : 3,159.59 = 719.89 : x
2. Step 2: Convert to fraction form
   2,106.52/3,159.59 = 719.89/x
3. Step 3: Cross multiply
   2,106.52x = 3,159.59 × 719.89
4. Step 4: Simplify right side
   2,106.52x = 2,274,557.25
5. Step 5: Solve for x
   x = 2,274,557.25/2,106.52
6. Step 6: Final answer
   x = 1,079.77