Finding the Fourth Proportional to 1,189,150.58, 1,641,019.47 and 645,272.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189,150.58 : 1,641,019.47 = 645,272.54 : x
2. Step 2: Convert to fraction form
   1,189,150.58/1,641,019.47 = 645,272.54/x
3. Step 3: Cross multiply
   1,189,150.58x = 1,641,019.47 × 645,272.54
4. Step 4: Simplify right side
   1,189,150.58x = 1,058,904,801,596.35
5. Step 5: Solve for x
   x = 1,058,904,801,596.35/1,189,150.58
6. Step 6: Final answer
   x = 890,471.58