Finding the Third Proportional to 99,667.13 and 215,942.63

Step by Step Solution

1. Step 1: Write the proportion equation
   99,667.13 : 215,942.63 = 215,942.63 : x
2. Step 2: Convert to fraction form
   99,667.13/215,942.63 = 215,942.63/x
3. Step 3: Cross multiply
   99,667.13x = 215,942.63 × 215,942.63
4. Step 4: Simplify right side
   99,667.13x = 46,631,217,291.89
5. Step 5: Solve for x
   x = 46,631,217,291.89/99,667.13
6. Step 6: Final answer
   x = 467,869.59