Finding the Third Proportional to 10,931.63 and 16,399.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,931.63 : 16,399.69 = 16,399.69 : x
2. Step 2: Convert to fraction form
   10,931.63/16,399.69 = 16,399.69/x
3. Step 3: Cross multiply
   10,931.63x = 16,399.69 × 16,399.69
4. Step 4: Simplify right side
   10,931.63x = 268,949,750.10
5. Step 5: Solve for x
   x = 268,949,750.10/10,931.63
6. Step 6: Final answer
   x = 24,602.91