Finding the Third Proportional to 40,870 and 64,221

Step by Step Solution

1. Step 1: Write the proportion equation
   40,870 : 64,221 = 64,221 : x
2. Step 2: Convert to fraction form
   40,870/64,221 = 64,221/x
3. Step 3: Cross multiply
   40,870x = 64,221 × 64,221
4. Step 4: Simplify right side
   40,870x = 4,124,336,841
5. Step 5: Solve for x
   x = 4,124,336,841/40,870
6. Step 6: Final answer
   x = 100,913.55