Finding the Third Proportional to 19,902,517 and 42,571,656

Step by Step Solution

1. Step 1: Write the proportion equation
   19,902,517 : 42,571,656 = 42,571,656 : x
2. Step 2: Convert to fraction form
   19,902,517/42,571,656 = 42,571,656/x
3. Step 3: Cross multiply
   19,902,517x = 42,571,656 × 42,571,656
4. Step 4: Simplify right side
   19,902,517x = 1,812,345,894,582,336
5. Step 5: Solve for x
   x = 1,812,345,894,582,336/19,902,517
6. Step 6: Final answer
   x = 91,061,140.39