Finding the Third Proportional to 99,340 and 215,499

Step by Step Solution

1. Step 1: Write the proportion equation
   99,340 : 215,499 = 215,499 : x
2. Step 2: Convert to fraction form
   99,340/215,499 = 215,499/x
3. Step 3: Cross multiply
   99,340x = 215,499 × 215,499
4. Step 4: Simplify right side
   99,340x = 46,439,819,001
5. Step 5: Solve for x
   x = 46,439,819,001/99,340
6. Step 6: Final answer
   x = 467,483.58