Finding the Third Proportional to 12,991.50 and 26,583.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,991.50 : 26,583.75 = 26,583.75 : x
2. Step 2: Convert to fraction form
   12,991.50/26,583.75 = 26,583.75/x
3. Step 3: Cross multiply
   12,991.50x = 26,583.75 × 26,583.75
4. Step 4: Simplify right side
   12,991.50x = 706,695,764.06
5. Step 5: Solve for x
   x = 706,695,764.06/12,991.50
6. Step 6: Final answer
   x = 54,396.78