Finding the Third Proportional to 40,405 and 87,931

Step by Step Solution

1. Step 1: Write the proportion equation
   40,405 : 87,931 = 87,931 : x
2. Step 2: Convert to fraction form
   40,405/87,931 = 87,931/x
3. Step 3: Cross multiply
   40,405x = 87,931 × 87,931
4. Step 4: Simplify right side
   40,405x = 7,731,860,761
5. Step 5: Solve for x
   x = 7,731,860,761/40,405
6. Step 6: Final answer
   x = 191,359.01