Finding the Third Proportional to 215,300 and 336,030

Step by Step Solution

1. Step 1: Write the proportion equation
   215,300 : 336,030 = 336,030 : x
2. Step 2: Convert to fraction form
   215,300/336,030 = 336,030/x
3. Step 3: Cross multiply
   215,300x = 336,030 × 336,030
4. Step 4: Simplify right side
   215,300x = 112,916,160,900
5. Step 5: Solve for x
   x = 112,916,160,900/215,300
6. Step 6: Final answer
   x = 524,459.64