Finding the Fourth Proportional to 1,485.10, 2,049.54 and 864.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.10 : 2,049.54 = 864.10 : x
2. Step 2: Convert to fraction form
   1,485.10/2,049.54 = 864.10/x
3. Step 3: Cross multiply
   1,485.10x = 2,049.54 × 864.10
4. Step 4: Simplify right side
   1,485.10x = 1,771,007.51
5. Step 5: Solve for x
   x = 1,771,007.51/1,485.10
6. Step 6: Final answer
   x = 1,192.52