Finding the Third Proportional to 67,513.50 and 90,031.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,513.50 : 90,031.50 = 90,031.50 : x
2. Step 2: Convert to fraction form
   67,513.50/90,031.50 = 90,031.50/x
3. Step 3: Cross multiply
   67,513.50x = 90,031.50 × 90,031.50
4. Step 4: Simplify right side
   67,513.50x = 8,105,670,992.25
5. Step 5: Solve for x
   x = 8,105,670,992.25/67,513.50
6. Step 6: Final answer
   x = 120,060.00