Finding the Fourth Proportional to 1,189,401.33, 1,641,375.46 and 645,537.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189,401.33 : 1,641,375.46 = 645,537.13 : x
2. Step 2: Convert to fraction form
   1,189,401.33/1,641,375.46 = 645,537.13/x
3. Step 3: Cross multiply
   1,189,401.33x = 1,641,375.46 × 645,537.13
4. Step 4: Simplify right side
   1,189,401.33x = 1,059,568,797,983.55
5. Step 5: Solve for x
   x = 1,059,568,797,983.55/1,189,401.33
6. Step 6: Final answer
   x = 890,842.12