Finding the Fourth Proportional to 1,419.94, 1,959.33 and 790.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.94 : 1,959.33 = 790.39 : x
2. Step 2: Convert to fraction form
   1,419.94/1,959.33 = 790.39/x
3. Step 3: Cross multiply
   1,419.94x = 1,959.33 × 790.39
4. Step 4: Simplify right side
   1,419.94x = 1,548,623.11
5. Step 5: Solve for x
   x = 1,548,623.11/1,419.94
6. Step 6: Final answer
   x = 1,090.62