Finding the Third Proportional to 99,726.19 and 216,067.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,726.19 : 216,067.50 = 216,067.50 : x
2. Step 2: Convert to fraction form
   99,726.19/216,067.50 = 216,067.50/x
3. Step 3: Cross multiply
   99,726.19x = 216,067.50 × 216,067.50
4. Step 4: Simplify right side
   99,726.19x = 46,685,164,556.25
5. Step 5: Solve for x
   x = 46,685,164,556.25/99,726.19
6. Step 6: Final answer
   x = 468,133.45