Finding the Third Proportional to 15,989.50 and 34,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,989.50 : 34,890.50 = 34,890.50 : x
2. Step 2: Convert to fraction form
   15,989.50/34,890.50 = 34,890.50/x
3. Step 3: Cross multiply
   15,989.50x = 34,890.50 × 34,890.50
4. Step 4: Simplify right side
   15,989.50x = 1,217,346,990.25
5. Step 5: Solve for x
   x = 1,217,346,990.25/15,989.50
6. Step 6: Final answer
   x = 76,134.15