Finding the Third Proportional to 42,560 and 64,992

Step by Step Solution

1. Step 1: Write the proportion equation
   42,560 : 64,992 = 64,992 : x
2. Step 2: Convert to fraction form
   42,560/64,992 = 64,992/x
3. Step 3: Cross multiply
   42,560x = 64,992 × 64,992
4. Step 4: Simplify right side
   42,560x = 4,223,960,064
5. Step 5: Solve for x
   x = 4,223,960,064/42,560
6. Step 6: Final answer
   x = 99,247.18