Finding the Third Proportional to 72,156 and 123,804

Step by Step Solution

1. Step 1: Write the proportion equation
   72,156 : 123,804 = 123,804 : x
2. Step 2: Convert to fraction form
   72,156/123,804 = 123,804/x
3. Step 3: Cross multiply
   72,156x = 123,804 × 123,804
4. Step 4: Simplify right side
   72,156x = 15,327,430,416
5. Step 5: Solve for x
   x = 15,327,430,416/72,156
6. Step 6: Final answer
   x = 212,420.73