Finding the Fourth Proportional to 1,419.80, 1,959.29 and 790.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.80 : 1,959.29 = 790.25 : x
2. Step 2: Convert to fraction form
   1,419.80/1,959.29 = 790.25/x
3. Step 3: Cross multiply
   1,419.80x = 1,959.29 × 790.25
4. Step 4: Simplify right side
   1,419.80x = 1,548,315.17
5. Step 5: Solve for x
   x = 1,548,315.17/1,419.80
6. Step 6: Final answer
   x = 1,090.52