Finding the Third Proportional to 85,123.25 and 128,868.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,123.25 : 128,868.50 = 128,868.50 : x
2. Step 2: Convert to fraction form
   85,123.25/128,868.50 = 128,868.50/x
3. Step 3: Cross multiply
   85,123.25x = 128,868.50 × 128,868.50
4. Step 4: Simplify right side
   85,123.25x = 16,607,090,292.25
5. Step 5: Solve for x
   x = 16,607,090,292.25/85,123.25
6. Step 6: Final answer
   x = 195,094.65