Finding the Third Proportional to 5,070 and 10,288.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,070 : 10,288.50 = 10,288.50 : x
2. Step 2: Convert to fraction form
   5,070/10,288.50 = 10,288.50/x
3. Step 3: Cross multiply
   5,070x = 10,288.50 × 10,288.50
4. Step 4: Simplify right side
   5,070x = 105,853,232.25
5. Step 5: Solve for x
   x = 105,853,232.25/5,070
6. Step 6: Final answer
   x = 20,878.35