Finding the Fourth Proportional to 1,389,929.94, 2,085,050.43 and 443,080.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389,929.94 : 2,085,050.43 = 443,080.98 : x
2. Step 2: Convert to fraction form
   1,389,929.94/2,085,050.43 = 443,080.98/x
3. Step 3: Cross multiply
   1,389,929.94x = 2,085,050.43 × 443,080.98
4. Step 4: Simplify right side
   1,389,929.94x = 923,846,187,873.82
5. Step 5: Solve for x
   x = 923,846,187,873.82/1,389,929.94
6. Step 6: Final answer
   x = 664,671.05