Finding the Third Proportional to 79,721,268 and 172,665,208

Step by Step Solution

1. Step 1: Write the proportion equation
   79,721,268 : 172,665,208 = 172,665,208 : x
2. Step 2: Convert to fraction form
   79,721,268/172,665,208 = 172,665,208/x
3. Step 3: Cross multiply
   79,721,268x = 172,665,208 × 172,665,208
4. Step 4: Simplify right side
   79,721,268x = 29,813,274,053,683,264
5. Step 5: Solve for x
   x = 29,813,274,053,683,264/79,721,268
6. Step 6: Final answer
   x = 373,968,889.38