Finding the Third Proportional to 138,457 and 215,029.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,457 : 215,029.50 = 215,029.50 : x
2. Step 2: Convert to fraction form
   138,457/215,029.50 = 215,029.50/x
3. Step 3: Cross multiply
   138,457x = 215,029.50 × 215,029.50
4. Step 4: Simplify right side
   138,457x = 46,237,685,870.25
5. Step 5: Solve for x
   x = 46,237,685,870.25/138,457
6. Step 6: Final answer
   x = 333,949.79