Finding the Fourth Proportional to 419,531,748.72, 578,770,146.96 and 400,081,008

Step by Step Solution

1. Step 1: Write the proportion equation
   419,531,748.72 : 578,770,146.96 = 400,081,008 : x
2. Step 2: Convert to fraction form
   419,531,748.72/578,770,146.96 = 400,081,008/x
3. Step 3: Cross multiply
   419,531,748.72x = 578,770,146.96 × 400,081,008
4. Step 4: Simplify right side
   419,531,748.72x = 231,554,943,796,064,960
5. Step 5: Solve for x
   x = 231,554,943,796,064,960/419,531,748.72
6. Step 6: Final answer
   x = 551,936,640.08