Finding the Fourth Proportional to 1,485.95, 2,050.83 and 856.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.95 : 2,050.83 = 856.57 : x
2. Step 2: Convert to fraction form
   1,485.95/2,050.83 = 856.57/x
3. Step 3: Cross multiply
   1,485.95x = 2,050.83 × 856.57
4. Step 4: Simplify right side
   1,485.95x = 1,756,679.45
5. Step 5: Solve for x
   x = 1,756,679.45/1,485.95
6. Step 6: Final answer
   x = 1,182.19