Finding the Fourth Proportional to 1,679.50, 2,519.61 and 706.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,679.50 : 2,519.61 = 706.42 : x
2. Step 2: Convert to fraction form
   1,679.50/2,519.61 = 706.42/x
3. Step 3: Cross multiply
   1,679.50x = 2,519.61 × 706.42
4. Step 4: Simplify right side
   1,679.50x = 1,779,902.90
5. Step 5: Solve for x
   x = 1,779,902.90/1,679.50
6. Step 6: Final answer
   x = 1,059.78