Finding the Third Proportional to 217,048.50 and 336,042

Step by Step Solution

1. Step 1: Write the proportion equation
   217,048.50 : 336,042 = 336,042 : x
2. Step 2: Convert to fraction form
   217,048.50/336,042 = 336,042/x
3. Step 3: Cross multiply
   217,048.50x = 336,042 × 336,042
4. Step 4: Simplify right side
   217,048.50x = 112,924,225,764
5. Step 5: Solve for x
   x = 112,924,225,764/217,048.50
6. Step 6: Final answer
   x = 520,271.86