Finding the Fourth Proportional to 1,485.97, 2,050.86 and 856.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.97 : 2,050.86 = 856.38 : x
2. Step 2: Convert to fraction form
   1,485.97/2,050.86 = 856.38/x
3. Step 3: Cross multiply
   1,485.97x = 2,050.86 × 856.38
4. Step 4: Simplify right side
   1,485.97x = 1,756,311.20
5. Step 5: Solve for x
   x = 1,756,311.20/1,485.97
6. Step 6: Final answer
   x = 1,181.93