Finding the Third Proportional to 86,751 and 128,425.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,751 : 128,425.50 = 128,425.50 : x
2. Step 2: Convert to fraction form
   86,751/128,425.50 = 128,425.50/x
3. Step 3: Cross multiply
   86,751x = 128,425.50 × 128,425.50
4. Step 4: Simplify right side
   86,751x = 16,493,109,050.25
5. Step 5: Solve for x
   x = 16,493,109,050.25/86,751
6. Step 6: Final answer
   x = 190,120.10