Finding the Third Proportional to 99,810.75 and 216,574.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,810.75 : 216,574.50 = 216,574.50 : x
2. Step 2: Convert to fraction form
   99,810.75/216,574.50 = 216,574.50/x
3. Step 3: Cross multiply
   99,810.75x = 216,574.50 × 216,574.50
4. Step 4: Simplify right side
   99,810.75x = 46,904,514,050.25
5. Step 5: Solve for x
   x = 46,904,514,050.25/99,810.75
6. Step 6: Final answer
   x = 469,934.49