Finding the Fourth Proportional to 1,419.72, 1,959.17 and 790.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.72 : 1,959.17 = 790.25 : x
2. Step 2: Convert to fraction form
   1,419.72/1,959.17 = 790.25/x
3. Step 3: Cross multiply
   1,419.72x = 1,959.17 × 790.25
4. Step 4: Simplify right side
   1,419.72x = 1,548,226.27
5. Step 5: Solve for x
   x = 1,548,226.27/1,419.72
6. Step 6: Final answer
   x = 1,090.52