Finding the Third Proportional to 217,081.50 and 335,466

Step by Step Solution

1. Step 1: Write the proportion equation
   217,081.50 : 335,466 = 335,466 : x
2. Step 2: Convert to fraction form
   217,081.50/335,466 = 335,466/x
3. Step 3: Cross multiply
   217,081.50x = 335,466 × 335,466
4. Step 4: Simplify right side
   217,081.50x = 112,537,437,156
5. Step 5: Solve for x
   x = 112,537,437,156/217,081.50
6. Step 6: Final answer
   x = 518,411.00