Finding the Third Proportional to 19,898,458 and 42,188,324

Step by Step Solution

1. Step 1: Write the proportion equation
   19,898,458 : 42,188,324 = 42,188,324 : x
2. Step 2: Convert to fraction form
   19,898,458/42,188,324 = 42,188,324/x
3. Step 3: Cross multiply
   19,898,458x = 42,188,324 × 42,188,324
4. Step 4: Simplify right side
   19,898,458x = 1,779,854,681,928,976
5. Step 5: Solve for x
   x = 1,779,854,681,928,976/19,898,458
6. Step 6: Final answer
   x = 89,446,864.77