Finding the Fourth Proportional to 1,368.82, 1,888.90 and 864.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.82 : 1,888.90 = 864.10 : x
2. Step 2: Convert to fraction form
   1,368.82/1,888.90 = 864.10/x
3. Step 3: Cross multiply
   1,368.82x = 1,888.90 × 864.10
4. Step 4: Simplify right side
   1,368.82x = 1,632,198.49
5. Step 5: Solve for x
   x = 1,632,198.49/1,368.82
6. Step 6: Final answer
   x = 1,192.41