Finding the Third Proportional to 12,938.64 and 19,707.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,938.64 : 19,707.05 = 19,707.05 : x
2. Step 2: Convert to fraction form
   12,938.64/19,707.05 = 19,707.05/x
3. Step 3: Cross multiply
   12,938.64x = 19,707.05 × 19,707.05
4. Step 4: Simplify right side
   12,938.64x = 388,367,696.53
5. Step 5: Solve for x
   x = 388,367,696.53/12,938.64
6. Step 6: Final answer
   x = 30,016.11