Finding the Third Proportional to 99,888.75 and 216,396

Step by Step Solution

1. Step 1: Write the proportion equation
   99,888.75 : 216,396 = 216,396 : x
2. Step 2: Convert to fraction form
   99,888.75/216,396 = 216,396/x
3. Step 3: Cross multiply
   99,888.75x = 216,396 × 216,396
4. Step 4: Simplify right side
   99,888.75x = 46,827,228,816
5. Step 5: Solve for x
   x = 46,827,228,816/99,888.75
6. Step 6: Final answer
   x = 468,793.82