Finding the Third Proportional to 78,636,279 and 171,078,520.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,636,279 : 171,078,520.50 = 171,078,520.50 : x
2. Step 2: Convert to fraction form
   78,636,279/171,078,520.50 = 171,078,520.50/x
3. Step 3: Cross multiply
   78,636,279x = 171,078,520.50 × 171,078,520.50
4. Step 4: Simplify right side
   78,636,279x = 29,267,860,176,468,920
5. Step 5: Solve for x
   x = 29,267,860,176,468,920/78,636,279
6. Step 6: Final answer
   x = 372,192,842.14