Finding the Fourth Proportional to 1,419.84, 1,959.40 and 790.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.84 : 1,959.40 = 790.38 : x
2. Step 2: Convert to fraction form
   1,419.84/1,959.40 = 790.38/x
3. Step 3: Cross multiply
   1,419.84x = 1,959.40 × 790.38
4. Step 4: Simplify right side
   1,419.84x = 1,548,670.57
5. Step 5: Solve for x
   x = 1,548,670.57/1,419.84
6. Step 6: Final answer
   x = 1,090.74