Finding the Third Proportional to 42,358 and 64,425

Step by Step Solution

1. Step 1: Write the proportion equation
   42,358 : 64,425 = 64,425 : x
2. Step 2: Convert to fraction form
   42,358/64,425 = 64,425/x
3. Step 3: Cross multiply
   42,358x = 64,425 × 64,425
4. Step 4: Simplify right side
   42,358x = 4,150,580,625
5. Step 5: Solve for x
   x = 4,150,580,625/42,358
6. Step 6: Final answer
   x = 97,988.12