Finding the Third Proportional to 85,128 and 128,875.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,128 : 128,875.50 = 128,875.50 : x
2. Step 2: Convert to fraction form
   85,128/128,875.50 = 128,875.50/x
3. Step 3: Cross multiply
   85,128x = 128,875.50 × 128,875.50
4. Step 4: Simplify right side
   85,128x = 16,608,894,500.25
5. Step 5: Solve for x
   x = 16,608,894,500.25/85,128
6. Step 6: Final answer
   x = 195,104.95