Finding the Fourth Proportional to 1,410.45, 1,945.89 and 812.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.45 : 1,945.89 = 812.77 : x
2. Step 2: Convert to fraction form
   1,410.45/1,945.89 = 812.77/x
3. Step 3: Cross multiply
   1,410.45x = 1,945.89 × 812.77
4. Step 4: Simplify right side
   1,410.45x = 1,581,556.15
5. Step 5: Solve for x
   x = 1,581,556.15/1,410.45
6. Step 6: Final answer
   x = 1,121.32