Finding the Third Proportional to 8,731.13 and 12,472.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,731.13 : 12,472.31 = 12,472.31 : x
2. Step 2: Convert to fraction form
   8,731.13/12,472.31 = 12,472.31/x
3. Step 3: Cross multiply
   8,731.13x = 12,472.31 × 12,472.31
4. Step 4: Simplify right side
   8,731.13x = 155,558,579.10
5. Step 5: Solve for x
   x = 155,558,579.10/8,731.13
6. Step 6: Final answer
   x = 17,816.56