Finding the Third Proportional to 99,279 and 215,237.25

Step by Step Solution

1. Step 1: Write the proportion equation
   99,279 : 215,237.25 = 215,237.25 : x
2. Step 2: Convert to fraction form
   99,279/215,237.25 = 215,237.25/x
3. Step 3: Cross multiply
   99,279x = 215,237.25 × 215,237.25
4. Step 4: Simplify right side
   99,279x = 46,327,073,787.56
5. Step 5: Solve for x
   x = 46,327,073,787.56/99,279
6. Step 6: Final answer
   x = 466,635.18