Finding the Third Proportional to 8,780.50 and 19,139

Step by Step Solution

1. Step 1: Write the proportion equation
   8,780.50 : 19,139 = 19,139 : x
2. Step 2: Convert to fraction form
   8,780.50/19,139 = 19,139/x
3. Step 3: Cross multiply
   8,780.50x = 19,139 × 19,139
4. Step 4: Simplify right side
   8,780.50x = 366,301,321
5. Step 5: Solve for x
   x = 366,301,321/8,780.50
6. Step 6: Final answer
   x = 41,717.59