Finding the Fourth Proportional to 1,445.33, 1,994.27 and 856.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.33 : 1,994.27 = 856.05 : x
2. Step 2: Convert to fraction form
   1,445.33/1,994.27 = 856.05/x
3. Step 3: Cross multiply
   1,445.33x = 1,994.27 × 856.05
4. Step 4: Simplify right side
   1,445.33x = 1,707,190.55
5. Step 5: Solve for x
   x = 1,707,190.55/1,445.33
6. Step 6: Final answer
   x = 1,181.18