Finding the Third Proportional to 68,989 and 105,488.50

Step by Step Solution

1. Step 1: Write the proportion equation
   68,989 : 105,488.50 = 105,488.50 : x
2. Step 2: Convert to fraction form
   68,989/105,488.50 = 105,488.50/x
3. Step 3: Cross multiply
   68,989x = 105,488.50 × 105,488.50
4. Step 4: Simplify right side
   68,989x = 11,127,823,632.25
5. Step 5: Solve for x
   x = 11,127,823,632.25/68,989
6. Step 6: Final answer
   x = 161,298.52