Finding the Fourth Proportional to 1,189,452.84, 1,641,446.73 and 645,588.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189,452.84 : 1,641,446.73 = 645,588.83 : x
2. Step 2: Convert to fraction form
   1,189,452.84/1,641,446.73 = 645,588.83/x
3. Step 3: Cross multiply
   1,189,452.84x = 1,641,446.73 × 645,588.83
4. Step 4: Simplify right side
   1,189,452.84x = 1,059,699,665,720.79
5. Step 5: Solve for x
   x = 1,059,699,665,720.79/1,189,452.84
6. Step 6: Final answer
   x = 890,913.56