Finding the Third Proportional to 13,691 and 28,111

Step by Step Solution

1. Step 1: Write the proportion equation
   13,691 : 28,111 = 28,111 : x
2. Step 2: Convert to fraction form
   13,691/28,111 = 28,111/x
3. Step 3: Cross multiply
   13,691x = 28,111 × 28,111
4. Step 4: Simplify right side
   13,691x = 790,228,321
5. Step 5: Solve for x
   x = 790,228,321/13,691
6. Step 6: Final answer
   x = 57,718.82