Finding the Fourth Proportional to 1,139,240.33, 1,707,854.83 and 429,766.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,240.33 : 1,707,854.83 = 429,766.59 : x
2. Step 2: Convert to fraction form
   1,139,240.33/1,707,854.83 = 429,766.59/x
3. Step 3: Cross multiply
   1,139,240.33x = 1,707,854.83 × 429,766.59
4. Step 4: Simplify right side
   1,139,240.33x = 733,978,951,834.17
5. Step 5: Solve for x
   x = 733,978,951,834.17/1,139,240.33
6. Step 6: Final answer
   x = 644,270.51