Finding the Fourth Proportional to 627,789.69, 866,647.35 and 401,566.41

Step by Step Solution

1. Step 1: Write the proportion equation
   627,789.69 : 866,647.35 = 401,566.41 : x
2. Step 2: Convert to fraction form
   627,789.69/866,647.35 = 401,566.41/x
3. Step 3: Cross multiply
   627,789.69x = 866,647.35 × 401,566.41
4. Step 4: Simplify right side
   627,789.69x = 348,016,465,075.51
5. Step 5: Solve for x
   x = 348,016,465,075.51/627,789.69
6. Step 6: Final answer
   x = 554,351.99