Finding the Third Proportional to 15,817.50 and 35,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,817.50 : 35,131.50 = 35,131.50 : x
2. Step 2: Convert to fraction form
   15,817.50/35,131.50 = 35,131.50/x
3. Step 3: Cross multiply
   15,817.50x = 35,131.50 × 35,131.50
4. Step 4: Simplify right side
   15,817.50x = 1,234,222,292.25
5. Step 5: Solve for x
   x = 1,234,222,292.25/15,817.50
6. Step 6: Final answer
   x = 78,028.91