Finding the Third Proportional to 40,422 and 87,468

Step by Step Solution

1. Step 1: Write the proportion equation
   40,422 : 87,468 = 87,468 : x
2. Step 2: Convert to fraction form
   40,422/87,468 = 87,468/x
3. Step 3: Cross multiply
   40,422x = 87,468 × 87,468
4. Step 4: Simplify right side
   40,422x = 7,650,651,024
5. Step 5: Solve for x
   x = 7,650,651,024/40,422
6. Step 6: Final answer
   x = 189,269.48