Finding the Fourth Proportional to 648,498.02, 894,942.42 and 406,790.78

Step by Step Solution

1. Step 1: Write the proportion equation
   648,498.02 : 894,942.42 = 406,790.78 : x
2. Step 2: Convert to fraction form
   648,498.02/894,942.42 = 406,790.78/x
3. Step 3: Cross multiply
   648,498.02x = 894,942.42 × 406,790.78
4. Step 4: Simplify right side
   648,498.02x = 364,054,325,086.89
5. Step 5: Solve for x
   x = 364,054,325,086.89/648,498.02
6. Step 6: Final answer
   x = 561,380.78