Finding the Fourth Proportional to 1,405.83, 2,110.02 and 712.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.83 : 2,110.02 = 712.96 : x
2. Step 2: Convert to fraction form
   1,405.83/2,110.02 = 712.96/x
3. Step 3: Cross multiply
   1,405.83x = 2,110.02 × 712.96
4. Step 4: Simplify right side
   1,405.83x = 1,504,359.86
5. Step 5: Solve for x
   x = 1,504,359.86/1,405.83
6. Step 6: Final answer
   x = 1,070.09