Finding the Third Proportional to 12,610.69 and 19,781.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,610.69 : 19,781.72 = 19,781.72 : x
2. Step 2: Convert to fraction form
   12,610.69/19,781.72 = 19,781.72/x
3. Step 3: Cross multiply
   12,610.69x = 19,781.72 × 19,781.72
4. Step 4: Simplify right side
   12,610.69x = 391,316,396.70
5. Step 5: Solve for x
   x = 391,316,396.70/12,610.69
6. Step 6: Final answer
   x = 31,030.54