Finding the Fourth Proportional to 1,389,942.69, 2,085,069.60 and 443,093.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389,942.69 : 2,085,069.60 = 443,093.73 : x
2. Step 2: Convert to fraction form
   1,389,942.69/2,085,069.60 = 443,093.73/x
3. Step 3: Cross multiply
   1,389,942.69x = 2,085,069.60 × 443,093.73
4. Step 4: Simplify right side
   1,389,942.69x = 923,881,266,373.61
5. Step 5: Solve for x
   x = 923,881,266,373.61/1,389,942.69
6. Step 6: Final answer
   x = 664,690.19