Finding the Fourth Proportional to 443,943,413.76, 612,643,221.72 and 245,718,676.38

Step by Step Solution

1. Step 1: Write the proportion equation
   443,943,413.76 : 612,643,221.72 = 245,718,676.38 : x
2. Step 2: Convert to fraction form
   443,943,413.76/612,643,221.72 = 245,718,676.38/x
3. Step 3: Cross multiply
   443,943,413.76x = 612,643,221.72 × 245,718,676.38
4. Step 4: Simplify right side
   443,943,413.76x = 150,537,881,534,217,280
5. Step 5: Solve for x
   x = 150,537,881,534,217,280/443,943,413.76
6. Step 6: Final answer
   x = 339,092,498.88