Finding the Fourth Proportional to 928,196.64, 1,392,469.20 and 296,940.96

Step by Step Solution

1. Step 1: Write the proportion equation
   928,196.64 : 1,392,469.20 = 296,940.96 : x
2. Step 2: Convert to fraction form
   928,196.64/1,392,469.20 = 296,940.96/x
3. Step 3: Cross multiply
   928,196.64x = 1,392,469.20 × 296,940.96
4. Step 4: Simplify right side
   928,196.64x = 413,481,141,018.43
5. Step 5: Solve for x
   x = 413,481,141,018.43/928,196.64
6. Step 6: Final answer
   x = 445,467.18