Finding the Fourth Proportional to 1,207,145.94, 1,665,236.73 and 819,981.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,207,145.94 : 1,665,236.73 = 819,981.30 : x
2. Step 2: Convert to fraction form
   1,207,145.94/1,665,236.73 = 819,981.30/x
3. Step 3: Cross multiply
   1,207,145.94x = 1,665,236.73 × 819,981.30
4. Step 4: Simplify right side
   1,207,145.94x = 1,365,462,978,673.15
5. Step 5: Solve for x
   x = 1,365,462,978,673.15/1,207,145.94
6. Step 6: Final answer
   x = 1,131,149.87