Finding the Fourth Proportional to 1,105.76, 1,526.56 and 856.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.76 : 1,526.56 = 856.56 : x
2. Step 2: Convert to fraction form
   1,105.76/1,526.56 = 856.56/x
3. Step 3: Cross multiply
   1,105.76x = 1,526.56 × 856.56
4. Step 4: Simplify right side
   1,105.76x = 1,307,590.23
5. Step 5: Solve for x
   x = 1,307,590.23/1,105.76
6. Step 6: Final answer
   x = 1,182.53