Finding the Third Proportional to 19,474,388 and 42,180,434

Step by Step Solution

1. Step 1: Write the proportion equation
   19,474,388 : 42,180,434 = 42,180,434 : x
2. Step 2: Convert to fraction form
   19,474,388/42,180,434 = 42,180,434/x
3. Step 3: Cross multiply
   19,474,388x = 42,180,434 × 42,180,434
4. Step 4: Simplify right side
   19,474,388x = 1,779,189,012,428,356
5. Step 5: Solve for x
   x = 1,779,189,012,428,356/19,474,388
6. Step 6: Final answer
   x = 91,360,458.28