Finding the Third Proportional to 76,820,669 and 168,964,123

Step by Step Solution

1. Step 1: Write the proportion equation
   76,820,669 : 168,964,123 = 168,964,123 : x
2. Step 2: Convert to fraction form
   76,820,669/168,964,123 = 168,964,123/x
3. Step 3: Cross multiply
   76,820,669x = 168,964,123 × 168,964,123
4. Step 4: Simplify right side
   76,820,669x = 28,548,874,861,159,128
5. Step 5: Solve for x
   x = 28,548,874,861,159,128/76,820,669
6. Step 6: Final answer
   x = 371,630,125.50