Finding the Third Proportional to 83,918.25 and 128,068.88

Step by Step Solution

1. Step 1: Write the proportion equation
   83,918.25 : 128,068.88 = 128,068.88 : x
2. Step 2: Convert to fraction form
   83,918.25/128,068.88 = 128,068.88/x
3. Step 3: Cross multiply
   83,918.25x = 128,068.88 × 128,068.88
4. Step 4: Simplify right side
   83,918.25x = 16,401,636,743.77
5. Step 5: Solve for x
   x = 16,401,636,743.77/83,918.25
6. Step 6: Final answer
   x = 195,447.79