Finding the Third Proportional to 66,109.50 and 139,023

Step by Step Solution

1. Step 1: Write the proportion equation
   66,109.50 : 139,023 = 139,023 : x
2. Step 2: Convert to fraction form
   66,109.50/139,023 = 139,023/x
3. Step 3: Cross multiply
   66,109.50x = 139,023 × 139,023
4. Step 4: Simplify right side
   66,109.50x = 19,327,394,529
5. Step 5: Solve for x
   x = 19,327,394,529/66,109.50
6. Step 6: Final answer
   x = 292,354.27