Finding the Third Proportional to 42,600 and 64,491

Step by Step Solution

1. Step 1: Write the proportion equation
   42,600 : 64,491 = 64,491 : x
2. Step 2: Convert to fraction form
   42,600/64,491 = 64,491/x
3. Step 3: Cross multiply
   42,600x = 64,491 × 64,491
4. Step 4: Simplify right side
   42,600x = 4,159,089,081
5. Step 5: Solve for x
   x = 4,159,089,081/42,600
6. Step 6: Final answer
   x = 97,631.20