Finding the Third Proportional to 42,921 and 64,134

Step by Step Solution

1. Step 1: Write the proportion equation
   42,921 : 64,134 = 64,134 : x
2. Step 2: Convert to fraction form
   42,921/64,134 = 64,134/x
3. Step 3: Cross multiply
   42,921x = 64,134 × 64,134
4. Step 4: Simplify right side
   42,921x = 4,113,169,956
5. Step 5: Solve for x
   x = 4,113,169,956/42,921
6. Step 6: Final answer
   x = 95,831.18