Finding the Third Proportional to 19,789,768 and 42,571,256

Step by Step Solution

1. Step 1: Write the proportion equation
   19,789,768 : 42,571,256 = 42,571,256 : x
2. Step 2: Convert to fraction form
   19,789,768/42,571,256 = 42,571,256/x
3. Step 3: Cross multiply
   19,789,768x = 42,571,256 × 42,571,256
4. Step 4: Simplify right side
   19,789,768x = 1,812,311,837,417,536
5. Step 5: Solve for x
   x = 1,812,311,837,417,536/19,789,768
6. Step 6: Final answer
   x = 91,578,225.55