Finding the Fourth Proportional to 1,419.55, 1,958.94 and 790.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.55 : 1,958.94 = 790.05 : x
2. Step 2: Convert to fraction form
   1,419.55/1,958.94 = 790.05/x
3. Step 3: Cross multiply
   1,419.55x = 1,958.94 × 790.05
4. Step 4: Simplify right side
   1,419.55x = 1,547,660.55
5. Step 5: Solve for x
   x = 1,547,660.55/1,419.55
6. Step 6: Final answer
   x = 1,090.25