Finding the Fourth Proportional to 1,093.03, 1,638.17 and 861.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,093.03 : 1,638.17 = 861.00 : x
2. Step 2: Convert to fraction form
   1,093.03/1,638.17 = 861.00/x
3. Step 3: Cross multiply
   1,093.03x = 1,638.17 × 861.00
4. Step 4: Simplify right side
   1,093.03x = 1,410,451.87
5. Step 5: Solve for x
   x = 1,410,451.87/1,093.03
6. Step 6: Final answer
   x = 1,290.41