Finding the Fourth Proportional to 1,419.98, 1,959.57 and 790.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.98 : 1,959.57 = 790.47 : x
2. Step 2: Convert to fraction form
   1,419.98/1,959.57 = 790.47/x
3. Step 3: Cross multiply
   1,419.98x = 1,959.57 × 790.47
4. Step 4: Simplify right side
   1,419.98x = 1,548,981.30
5. Step 5: Solve for x
   x = 1,548,981.30/1,419.98
6. Step 6: Final answer
   x = 1,090.85