Finding the Fourth Proportional to 1,446.11, 1,994.89 and 856.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.11 : 1,994.89 = 856.43 : x
2. Step 2: Convert to fraction form
   1,446.11/1,994.89 = 856.43/x
3. Step 3: Cross multiply
   1,446.11x = 1,994.89 × 856.43
4. Step 4: Simplify right side
   1,446.11x = 1,708,483.64
5. Step 5: Solve for x
   x = 1,708,483.64/1,446.11
6. Step 6: Final answer
   x = 1,181.43