Finding the Third Proportional to 66,031.50 and 139,353

Step by Step Solution

1. Step 1: Write the proportion equation
   66,031.50 : 139,353 = 139,353 : x
2. Step 2: Convert to fraction form
   66,031.50/139,353 = 139,353/x
3. Step 3: Cross multiply
   66,031.50x = 139,353 × 139,353
4. Step 4: Simplify right side
   66,031.50x = 19,419,258,609
5. Step 5: Solve for x
   x = 19,419,258,609/66,031.50
6. Step 6: Final answer
   x = 294,090.83