Finding the Third Proportional to 12,991 and 28,083.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,991 : 28,083.50 = 28,083.50 : x
2. Step 2: Convert to fraction form
   12,991/28,083.50 = 28,083.50/x
3. Step 3: Cross multiply
   12,991x = 28,083.50 × 28,083.50
4. Step 4: Simplify right side
   12,991x = 788,682,972.25
5. Step 5: Solve for x
   x = 788,682,972.25/12,991
6. Step 6: Final answer
   x = 60,709.95