Finding the Third Proportional to 66,399.75 and 105,193.69

Step by Step Solution

1. Step 1: Write the proportion equation
   66,399.75 : 105,193.69 = 105,193.69 : x
2. Step 2: Convert to fraction form
   66,399.75/105,193.69 = 105,193.69/x
3. Step 3: Cross multiply
   66,399.75x = 105,193.69 × 105,193.69
4. Step 4: Simplify right side
   66,399.75x = 11,065,711,889.85
5. Step 5: Solve for x
   x = 11,065,711,889.85/66,399.75
6. Step 6: Final answer
   x = 166,652.91