Finding the Third Proportional to 72,910,176 and 172,111,344

Step by Step Solution

1. Step 1: Write the proportion equation
   72,910,176 : 172,111,344 = 172,111,344 : x
2. Step 2: Convert to fraction form
   72,910,176/172,111,344 = 172,111,344/x
3. Step 3: Cross multiply
   72,910,176x = 172,111,344 × 172,111,344
4. Step 4: Simplify right side
   72,910,176x = 29,622,314,733,486,336
5. Step 5: Solve for x
   x = 29,622,314,733,486,336/72,910,176
6. Step 6: Final answer
   x = 406,285,053.18