Finding the Third Proportional to 81,901 and 123,428.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,901 : 123,428.50 = 123,428.50 : x
2. Step 2: Convert to fraction form
   81,901/123,428.50 = 123,428.50/x
3. Step 3: Cross multiply
   81,901x = 123,428.50 × 123,428.50
4. Step 4: Simplify right side
   81,901x = 15,234,594,612.25
5. Step 5: Solve for x
   x = 15,234,594,612.25/81,901
6. Step 6: Final answer
   x = 186,012.32