Finding the Third Proportional to 17,991 and 25,681.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,991 : 25,681.50 = 25,681.50 : x
2. Step 2: Convert to fraction form
   17,991/25,681.50 = 25,681.50/x
3. Step 3: Cross multiply
   17,991x = 25,681.50 × 25,681.50
4. Step 4: Simplify right side
   17,991x = 659,539,442.25
5. Step 5: Solve for x
   x = 659,539,442.25/17,991
6. Step 6: Final answer
   x = 36,659.41