Finding the Third Proportional to 40,122 and 86,940

Step by Step Solution

1. Step 1: Write the proportion equation
   40,122 : 86,940 = 86,940 : x
2. Step 2: Convert to fraction form
   40,122/86,940 = 86,940/x
3. Step 3: Cross multiply
   40,122x = 86,940 × 86,940
4. Step 4: Simplify right side
   40,122x = 7,558,563,600
5. Step 5: Solve for x
   x = 7,558,563,600/40,122
6. Step 6: Final answer
   x = 188,389.50