Finding the Third Proportional to 12,761.30 and 19,715.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,761.30 : 19,715.91 = 19,715.91 : x
2. Step 2: Convert to fraction form
   12,761.30/19,715.91 = 19,715.91/x
3. Step 3: Cross multiply
   12,761.30x = 19,715.91 × 19,715.91
4. Step 4: Simplify right side
   12,761.30x = 388,716,959.26
5. Step 5: Solve for x
   x = 388,716,959.26/12,761.30
6. Step 6: Final answer
   x = 30,460.62