Finding the Third Proportional to 191,728,470 and 419,329,320

Step by Step Solution

1. Step 1: Write the proportion equation
   191,728,470 : 419,329,320 = 419,329,320 : x
2. Step 2: Convert to fraction form
   191,728,470/419,329,320 = 419,329,320/x
3. Step 3: Cross multiply
   191,728,470x = 419,329,320 × 419,329,320
4. Step 4: Simplify right side
   191,728,470x = 175,837,078,611,662,400
5. Step 5: Solve for x
   x = 175,837,078,611,662,400/191,728,470
6. Step 6: Final answer
   x = 917,115,119.17