Finding the Fourth Proportional to 1,113.27, 1,536.90 and 864.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.27 : 1,536.90 = 864.03 : x
2. Step 2: Convert to fraction form
   1,113.27/1,536.90 = 864.03/x
3. Step 3: Cross multiply
   1,113.27x = 1,536.90 × 864.03
4. Step 4: Simplify right side
   1,113.27x = 1,327,927.71
5. Step 5: Solve for x
   x = 1,327,927.71/1,113.27
6. Step 6: Final answer
   x = 1,192.82