Finding the Fourth Proportional to 623,038,443.48, 860,057,788.73 and 388,205,129.97

Step by Step Solution

1. Step 1: Write the proportion equation
   623,038,443.48 : 860,057,788.73 = 388,205,129.97 : x
2. Step 2: Convert to fraction form
   623,038,443.48/860,057,788.73 = 388,205,129.97/x
3. Step 3: Cross multiply
   623,038,443.48x = 860,057,788.73 × 388,205,129.97
4. Step 4: Simplify right side
   623,038,443.48x = 333,878,845,653,699,456
5. Step 5: Solve for x
   x = 333,878,845,653,699,456/623,038,443.48
6. Step 6: Final answer
   x = 535,888,032.51