Finding the Third Proportional to 300,753,379.50 and 478,557,745.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,753,379.50 : 478,557,745.50 = 478,557,745.50 : x
2. Step 2: Convert to fraction form
   300,753,379.50/478,557,745.50 = 478,557,745.50/x
3. Step 3: Cross multiply
   300,753,379.50x = 478,557,745.50 × 478,557,745.50
4. Step 4: Simplify right side
   300,753,379.50x = 229,017,515,778,042,784
5. Step 5: Solve for x
   x = 229,017,515,778,042,784/300,753,379.50
6. Step 6: Final answer
   x = 761,479,442.59