Finding the Fourth Proportional to 1,587.37, 2,190.21 and 958.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.37 : 2,190.21 = 958.00 : x
2. Step 2: Convert to fraction form
   1,587.37/2,190.21 = 958.00/x
3. Step 3: Cross multiply
   1,587.37x = 2,190.21 × 958.00
4. Step 4: Simplify right side
   1,587.37x = 2,098,210.23
5. Step 5: Solve for x
   x = 2,098,210.23/1,587.37
6. Step 6: Final answer
   x = 1,321.82