Finding the Fourth Proportional to 1,419.93, 1,959.48 and 790.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.93 : 1,959.48 = 790.50 : x
2. Step 2: Convert to fraction form
   1,419.93/1,959.48 = 790.50/x
3. Step 3: Cross multiply
   1,419.93x = 1,959.48 × 790.50
4. Step 4: Simplify right side
   1,419.93x = 1,548,968.94
5. Step 5: Solve for x
   x = 1,548,968.94/1,419.93
6. Step 6: Final answer
   x = 1,090.88