Finding the Fourth Proportional to 1,587.06, 2,380.57 and 709.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.06 : 2,380.57 = 709.33 : x
2. Step 2: Convert to fraction form
   1,587.06/2,380.57 = 709.33/x
3. Step 3: Cross multiply
   1,587.06x = 2,380.57 × 709.33
4. Step 4: Simplify right side
   1,587.06x = 1,688,609.72
5. Step 5: Solve for x
   x = 1,688,609.72/1,587.06
6. Step 6: Final answer
   x = 1,063.99