Finding the Third Proportional to 28,689 and 61,528.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,689 : 61,528.50 = 61,528.50 : x
2. Step 2: Convert to fraction form
   28,689/61,528.50 = 61,528.50/x
3. Step 3: Cross multiply
   28,689x = 61,528.50 × 61,528.50
4. Step 4: Simplify right side
   28,689x = 3,785,756,312.25
5. Step 5: Solve for x
   x = 3,785,756,312.25/28,689
6. Step 6: Final answer
   x = 131,958.46