Finding the Third Proportional to 8,547.40 and 12,938.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,547.40 : 12,938.48 = 12,938.48 : x
2. Step 2: Convert to fraction form
   8,547.40/12,938.48 = 12,938.48/x
3. Step 3: Cross multiply
   8,547.40x = 12,938.48 × 12,938.48
4. Step 4: Simplify right side
   8,547.40x = 167,404,377.92
5. Step 5: Solve for x
   x = 167,404,377.92/8,547.40
6. Step 6: Final answer
   x = 19,585.42