Finding the Third Proportional to 90,031.50 and 122,647.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,031.50 : 122,647.50 = 122,647.50 : x
2. Step 2: Convert to fraction form
   90,031.50/122,647.50 = 122,647.50/x
3. Step 3: Cross multiply
   90,031.50x = 122,647.50 × 122,647.50
4. Step 4: Simplify right side
   90,031.50x = 15,042,409,256.25
5. Step 5: Solve for x
   x = 15,042,409,256.25/90,031.50
6. Step 6: Final answer
   x = 167,079.40