Finding the Third Proportional to 42,345 and 89,388

Step by Step Solution

1. Step 1: Write the proportion equation
   42,345 : 89,388 = 89,388 : x
2. Step 2: Convert to fraction form
   42,345/89,388 = 89,388/x
3. Step 3: Cross multiply
   42,345x = 89,388 × 89,388
4. Step 4: Simplify right side
   42,345x = 7,990,214,544
5. Step 5: Solve for x
   x = 7,990,214,544/42,345
6. Step 6: Final answer
   x = 188,693.22