Finding the Third Proportional to 6,429 and 10,120.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,429 : 10,120.50 = 10,120.50 : x
2. Step 2: Convert to fraction form
   6,429/10,120.50 = 10,120.50/x
3. Step 3: Cross multiply
   6,429x = 10,120.50 × 10,120.50
4. Step 4: Simplify right side
   6,429x = 102,424,520.25
5. Step 5: Solve for x
   x = 102,424,520.25/6,429
6. Step 6: Final answer
   x = 15,931.64