Finding the Fourth Proportional to 1,419.77, 1,959.32 and 790.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.77 : 1,959.32 = 790.34 : x
2. Step 2: Convert to fraction form
   1,419.77/1,959.32 = 790.34/x
3. Step 3: Cross multiply
   1,419.77x = 1,959.32 × 790.34
4. Step 4: Simplify right side
   1,419.77x = 1,548,528.97
5. Step 5: Solve for x
   x = 1,548,528.97/1,419.77
6. Step 6: Final answer
   x = 1,090.69