Finding the Fourth Proportional to 1,389,401.22, 2,083,810.20 and 391,895.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389,401.22 : 2,083,810.20 = 391,895.94 : x
2. Step 2: Convert to fraction form
   1,389,401.22/2,083,810.20 = 391,895.94/x
3. Step 3: Cross multiply
   1,389,401.22x = 2,083,810.20 × 391,895.94
4. Step 4: Simplify right side
   1,389,401.22x = 816,636,757,110.59
5. Step 5: Solve for x
   x = 816,636,757,110.59/1,389,401.22
6. Step 6: Final answer
   x = 587,761.65