Finding the Fourth Proportional to 1,152,707.10, 1,729,363.05 and 442,758.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152,707.10 : 1,729,363.05 = 442,758.30 : x
2. Step 2: Convert to fraction form
   1,152,707.10/1,729,363.05 = 442,758.30/x
3. Step 3: Cross multiply
   1,152,707.10x = 1,729,363.05 × 442,758.30
4. Step 4: Simplify right side
   1,152,707.10x = 765,689,844,100.82
5. Step 5: Solve for x
   x = 765,689,844,100.82/1,152,707.10
6. Step 6: Final answer
   x = 664,253.60