Finding the Third Proportional to 99,569.25 and 215,039.81

Step by Step Solution

1. Step 1: Write the proportion equation
   99,569.25 : 215,039.81 = 215,039.81 : x
2. Step 2: Convert to fraction form
   99,569.25/215,039.81 = 215,039.81/x
3. Step 3: Cross multiply
   99,569.25x = 215,039.81 × 215,039.81
4. Step 4: Simplify right side
   99,569.25x = 46,242,120,960.04
5. Step 5: Solve for x
   x = 46,242,120,960.04/99,569.25
6. Step 6: Final answer
   x = 464,421.71