Finding the Third Proportional to 66,109 and 100,711.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,109 : 100,711.50 = 100,711.50 : x
2. Step 2: Convert to fraction form
   66,109/100,711.50 = 100,711.50/x
3. Step 3: Cross multiply
   66,109x = 100,711.50 × 100,711.50
4. Step 4: Simplify right side
   66,109x = 10,142,806,232.25
5. Step 5: Solve for x
   x = 10,142,806,232.25/66,109
6. Step 6: Final answer
   x = 153,425.50