Finding the Third Proportional to 43,123 and 68,572.50

Step by Step Solution

1. Step 1: Write the proportion equation
   43,123 : 68,572.50 = 68,572.50 : x
2. Step 2: Convert to fraction form
   43,123/68,572.50 = 68,572.50/x
3. Step 3: Cross multiply
   43,123x = 68,572.50 × 68,572.50
4. Step 4: Simplify right side
   43,123x = 4,702,187,756.25
5. Step 5: Solve for x
   x = 4,702,187,756.25/43,123
6. Step 6: Final answer
   x = 109,041.29