Finding the Third Proportional to 11,619 and 28,039.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,619 : 28,039.50 = 28,039.50 : x
2. Step 2: Convert to fraction form
   11,619/28,039.50 = 28,039.50/x
3. Step 3: Cross multiply
   11,619x = 28,039.50 × 28,039.50
4. Step 4: Simplify right side
   11,619x = 786,213,560.25
5. Step 5: Solve for x
   x = 786,213,560.25/11,619
6. Step 6: Final answer
   x = 67,666.20