Finding the Fourth Proportional to 1,587.83, 2,191.35 and 958.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.83 : 2,191.35 = 958.67 : x
2. Step 2: Convert to fraction form
   1,587.83/2,191.35 = 958.67/x
3. Step 3: Cross multiply
   1,587.83x = 2,191.35 × 958.67
4. Step 4: Simplify right side
   1,587.83x = 2,100,781.50
5. Step 5: Solve for x
   x = 2,100,781.50/1,587.83
6. Step 6: Final answer
   x = 1,323.05