Finding the Third Proportional to 78,855,938 and 172,844,410

Step by Step Solution

1. Step 1: Write the proportion equation
   78,855,938 : 172,844,410 = 172,844,410 : x
2. Step 2: Convert to fraction form
   78,855,938/172,844,410 = 172,844,410/x
3. Step 3: Cross multiply
   78,855,938x = 172,844,410 × 172,844,410
4. Step 4: Simplify right side
   78,855,938x = 29,875,190,068,248,100
5. Step 5: Solve for x
   x = 29,875,190,068,248,100/78,855,938
6. Step 6: Final answer
   x = 378,857,836.53