Finding the Fourth Proportional to 694,981,443.86, 959,093,121.60 and 408,892,940.09

Step by Step Solution

1. Step 1: Write the proportion equation
   694,981,443.86 : 959,093,121.60 = 408,892,940.09 : x
2. Step 2: Convert to fraction form
   694,981,443.86/959,093,121.60 = 408,892,940.09/x
3. Step 3: Cross multiply
   694,981,443.86x = 959,093,121.60 × 408,892,940.09
4. Step 4: Simplify right side
   694,981,443.86x = 392,166,406,311,984,256
5. Step 5: Solve for x
   x = 392,166,406,311,984,256/694,981,443.86
6. Step 6: Final answer
   x = 564,283,276.60