Finding the Third Proportional to 42,430 and 64,545

Step by Step Solution

1. Step 1: Write the proportion equation
   42,430 : 64,545 = 64,545 : x
2. Step 2: Convert to fraction form
   42,430/64,545 = 64,545/x
3. Step 3: Cross multiply
   42,430x = 64,545 × 64,545
4. Step 4: Simplify right side
   42,430x = 4,166,057,025
5. Step 5: Solve for x
   x = 4,166,057,025/42,430
6. Step 6: Final answer
   x = 98,186.59