Finding the Third Proportional to 216,588 and 333,340

Step by Step Solution

1. Step 1: Write the proportion equation
   216,588 : 333,340 = 333,340 : x
2. Step 2: Convert to fraction form
   216,588/333,340 = 333,340/x
3. Step 3: Cross multiply
   216,588x = 333,340 × 333,340
4. Step 4: Simplify right side
   216,588x = 111,115,555,600
5. Step 5: Solve for x
   x = 111,115,555,600/216,588
6. Step 6: Final answer
   x = 513,027.29