Finding the Fourth Proportional to 1,189,173.93, 1,641,064.49 and 645,309.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189,173.93 : 1,641,064.49 = 645,309.83 : x
2. Step 2: Convert to fraction form
   1,189,173.93/1,641,064.49 = 645,309.83/x
3. Step 3: Cross multiply
   1,189,173.93x = 1,641,064.49 × 645,309.83
4. Step 4: Simplify right side
   1,189,173.93x = 1,058,995,047,060.94
5. Step 5: Solve for x
   x = 1,058,995,047,060.94/1,189,173.93
6. Step 6: Final answer
   x = 890,529.99