Finding the Fourth Proportional to 648,096.27, 894,123.41 and 405,957.30

Step by Step Solution

1. Step 1: Write the proportion equation
   648,096.27 : 894,123.41 = 405,957.30 : x
2. Step 2: Convert to fraction form
   648,096.27/894,123.41 = 405,957.30/x
3. Step 3: Cross multiply
   648,096.27x = 894,123.41 × 405,957.30
4. Step 4: Simplify right side
   648,096.27x = 362,975,923,360.61
5. Step 5: Solve for x
   x = 362,975,923,360.61/648,096.27
6. Step 6: Final answer
   x = 560,064.82