Finding the Fourth Proportional to 1,485.50, 2,050.18 and 864.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.50 : 2,050.18 = 864.50 : x
2. Step 2: Convert to fraction form
   1,485.50/2,050.18 = 864.50/x
3. Step 3: Cross multiply
   1,485.50x = 2,050.18 × 864.50
4. Step 4: Simplify right side
   1,485.50x = 1,772,380.61
5. Step 5: Solve for x
   x = 1,772,380.61/1,485.50
6. Step 6: Final answer
   x = 1,193.12