Finding the Third Proportional to 89,357.67 and 139,311.70

Step by Step Solution

1. Step 1: Write the proportion equation
   89,357.67 : 139,311.70 = 139,311.70 : x
2. Step 2: Convert to fraction form
   89,357.67/139,311.70 = 139,311.70/x
3. Step 3: Cross multiply
   89,357.67x = 139,311.70 × 139,311.70
4. Step 4: Simplify right side
   89,357.67x = 19,407,750,627.59
5. Step 5: Solve for x
   x = 19,407,750,627.59/89,357.67
6. Step 6: Final answer
   x = 217,191.77