Finding the Third Proportional to 28,509.50 and 60,710

Step by Step Solution

1. Step 1: Write the proportion equation
   28,509.50 : 60,710 = 60,710 : x
2. Step 2: Convert to fraction form
   28,509.50/60,710 = 60,710/x
3. Step 3: Cross multiply
   28,509.50x = 60,710 × 60,710
4. Step 4: Simplify right side
   28,509.50x = 3,685,704,100
5. Step 5: Solve for x
   x = 3,685,704,100/28,509.50
6. Step 6: Final answer
   x = 129,279.86