Finding the Fourth Proportional to 1,419.95, 1,959.56 and 790.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.95 : 1,959.56 = 790.49 : x
2. Step 2: Convert to fraction form
   1,419.95/1,959.56 = 790.49/x
3. Step 3: Cross multiply
   1,419.95x = 1,959.56 × 790.49
4. Step 4: Simplify right side
   1,419.95x = 1,549,008.63
5. Step 5: Solve for x
   x = 1,549,008.63/1,419.95
6. Step 6: Final answer
   x = 1,090.89