Finding the Third Proportional to 42,255 and 64,881

Step by Step Solution

1. Step 1: Write the proportion equation
   42,255 : 64,881 = 64,881 : x
2. Step 2: Convert to fraction form
   42,255/64,881 = 64,881/x
3. Step 3: Cross multiply
   42,255x = 64,881 × 64,881
4. Step 4: Simplify right side
   42,255x = 4,209,544,161
5. Step 5: Solve for x
   x = 4,209,544,161/42,255
6. Step 6: Final answer
   x = 99,622.39