Finding the Fourth Proportional to 1,419.82, 1,959.29 and 790.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.82 : 1,959.29 = 790.31 : x
2. Step 2: Convert to fraction form
   1,419.82/1,959.29 = 790.31/x
3. Step 3: Cross multiply
   1,419.82x = 1,959.29 × 790.31
4. Step 4: Simplify right side
   1,419.82x = 1,548,450.39
5. Step 5: Solve for x
   x = 1,548,450.39/1,419.82
6. Step 6: Final answer
   x = 1,090.60