Finding the Third Proportional to 42,380 and 90,388

Step by Step Solution

1. Step 1: Write the proportion equation
   42,380 : 90,388 = 90,388 : x
2. Step 2: Convert to fraction form
   42,380/90,388 = 90,388/x
3. Step 3: Cross multiply
   42,380x = 90,388 × 90,388
4. Step 4: Simplify right side
   42,380x = 8,169,990,544
5. Step 5: Solve for x
   x = 8,169,990,544/42,380
6. Step 6: Final answer
   x = 192,779.39