Finding the Fourth Proportional to 1,205,443.72, 1,808,414.22 and 395,889.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,205,443.72 : 1,808,414.22 = 395,889.16 : x
2. Step 2: Convert to fraction form
   1,205,443.72/1,808,414.22 = 395,889.16/x
3. Step 3: Cross multiply
   1,205,443.72x = 1,808,414.22 × 395,889.16
4. Step 4: Simplify right side
   1,205,443.72x = 715,931,586,487.86
5. Step 5: Solve for x
   x = 715,931,586,487.86/1,205,443.72
6. Step 6: Final answer
   x = 593,915.40