Finding the Third Proportional to 28,705.50 and 60,885.75

Step by Step Solution

1. Step 1: Write the proportion equation
   28,705.50 : 60,885.75 = 60,885.75 : x
2. Step 2: Convert to fraction form
   28,705.50/60,885.75 = 60,885.75/x
3. Step 3: Cross multiply
   28,705.50x = 60,885.75 × 60,885.75
4. Step 4: Simplify right side
   28,705.50x = 3,707,074,553.06
5. Step 5: Solve for x
   x = 3,707,074,553.06/28,705.50
6. Step 6: Final answer
   x = 129,141.61