Finding the Third Proportional to 55,457 and 86,030

Step by Step Solution

1. Step 1: Write the proportion equation
   55,457 : 86,030 = 86,030 : x
2. Step 2: Convert to fraction form
   55,457/86,030 = 86,030/x
3. Step 3: Cross multiply
   55,457x = 86,030 × 86,030
4. Step 4: Simplify right side
   55,457x = 7,401,160,900
5. Step 5: Solve for x
   x = 7,401,160,900/55,457
6. Step 6: Final answer
   x = 133,457.65