Finding the Third Proportional to 66,123 and 99,328.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,123 : 99,328.50 = 99,328.50 : x
2. Step 2: Convert to fraction form
   66,123/99,328.50 = 99,328.50/x
3. Step 3: Cross multiply
   66,123x = 99,328.50 × 99,328.50
4. Step 4: Simplify right side
   66,123x = 9,866,150,912.25
5. Step 5: Solve for x
   x = 9,866,150,912.25/66,123
6. Step 6: Final answer
   x = 149,209.06