Finding the Fourth Proportional to 1,485.92, 2,050.78 and 856.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.92 : 2,050.78 = 856.32 : x
2. Step 2: Convert to fraction form
   1,485.92/2,050.78 = 856.32/x
3. Step 3: Cross multiply
   1,485.92x = 2,050.78 × 856.32
4. Step 4: Simplify right side
   1,485.92x = 1,756,123.93
5. Step 5: Solve for x
   x = 1,756,123.93/1,485.92
6. Step 6: Final answer
   x = 1,181.84