Finding the Fourth Proportional to 1,152,210.37, 1,728,398.59 and 442,238.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152,210.37 : 1,728,398.59 = 442,238.41 : x
2. Step 2: Convert to fraction form
   1,152,210.37/1,728,398.59 = 442,238.41/x
3. Step 3: Cross multiply
   1,152,210.37x = 1,728,398.59 × 442,238.41
4. Step 4: Simplify right side
   1,152,210.37x = 764,364,236,878.55
5. Step 5: Solve for x
   x = 764,364,236,878.55/1,152,210.37
6. Step 6: Final answer
   x = 663,389.48