Finding the Fourth Proportional to 627,016.49, 865,284.28 and 340,530.42

Step by Step Solution

1. Step 1: Write the proportion equation
   627,016.49 : 865,284.28 = 340,530.42 : x
2. Step 2: Convert to fraction form
   627,016.49/865,284.28 = 340,530.42/x
3. Step 3: Cross multiply
   627,016.49x = 865,284.28 × 340,530.42
4. Step 4: Simplify right side
   627,016.49x = 294,655,619,287.80
5. Step 5: Solve for x
   x = 294,655,619,287.80/627,016.49
6. Step 6: Final answer
   x = 469,932.81