Finding the Fourth Proportional to 1,411.09, 1,947.31 and 790.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.09 : 1,947.31 = 790.09 : x
2. Step 2: Convert to fraction form
   1,411.09/1,947.31 = 790.09/x
3. Step 3: Cross multiply
   1,411.09x = 1,947.31 × 790.09
4. Step 4: Simplify right side
   1,411.09x = 1,538,550.16
5. Step 5: Solve for x
   x = 1,538,550.16/1,411.09
6. Step 6: Final answer
   x = 1,090.33