Finding the Fourth Proportional to 1,076.71, 1,484.85 and 856.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.71 : 1,484.85 = 856.39 : x
2. Step 2: Convert to fraction form
   1,076.71/1,484.85 = 856.39/x
3. Step 3: Cross multiply
   1,076.71x = 1,484.85 × 856.39
4. Step 4: Simplify right side
   1,076.71x = 1,271,610.69
5. Step 5: Solve for x
   x = 1,271,610.69/1,076.71
6. Step 6: Final answer
   x = 1,181.02