Finding the Fourth Proportional to 1,152,661.39, 1,729,075.12 and 442,689.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152,661.39 : 1,729,075.12 = 442,689.43 : x
2. Step 2: Convert to fraction form
   1,152,661.39/1,729,075.12 = 442,689.43/x
3. Step 3: Cross multiply
   1,152,661.39x = 1,729,075.12 × 442,689.43
4. Step 4: Simplify right side
   1,152,661.39x = 765,443,273,672.04
5. Step 5: Solve for x
   x = 765,443,273,672.04/1,152,661.39
6. Step 6: Final answer
   x = 664,066.03