Finding the Third Proportional to 42,388 and 56,249

Step by Step Solution

1. Step 1: Write the proportion equation
   42,388 : 56,249 = 56,249 : x
2. Step 2: Convert to fraction form
   42,388/56,249 = 56,249/x
3. Step 3: Cross multiply
   42,388x = 56,249 × 56,249
4. Step 4: Simplify right side
   42,388x = 3,163,950,001
5. Step 5: Solve for x
   x = 3,163,950,001/42,388
6. Step 6: Final answer
   x = 74,642.59