Finding the Fourth Proportional to 1,358.00, 1,874.34 and 861.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.00 : 1,874.34 = 861.30 : x
2. Step 2: Convert to fraction form
   1,358.00/1,874.34 = 861.30/x
3. Step 3: Cross multiply
   1,358.00x = 1,874.34 × 861.30
4. Step 4: Simplify right side
   1,358.00x = 1,614,369.04
5. Step 5: Solve for x
   x = 1,614,369.04/1,358.00
6. Step 6: Final answer
   x = 1,188.79