Finding the Third Proportional to 10,088.50 and 20,586.75

Step by Step Solution

1. Step 1: Write the proportion equation
   10,088.50 : 20,586.75 = 20,586.75 : x
2. Step 2: Convert to fraction form
   10,088.50/20,586.75 = 20,586.75/x
3. Step 3: Cross multiply
   10,088.50x = 20,586.75 × 20,586.75
4. Step 4: Simplify right side
   10,088.50x = 423,814,275.56
5. Step 5: Solve for x
   x = 423,814,275.56/10,088.50
6. Step 6: Final answer
   x = 42,009.64