Finding the Third Proportional to 89,121.75 and 139,150.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,121.75 : 139,150.50 = 139,150.50 : x
2. Step 2: Convert to fraction form
   89,121.75/139,150.50 = 139,150.50/x
3. Step 3: Cross multiply
   89,121.75x = 139,150.50 × 139,150.50
4. Step 4: Simplify right side
   89,121.75x = 19,362,861,650.25
5. Step 5: Solve for x
   x = 19,362,861,650.25/89,121.75
6. Step 6: Final answer
   x = 217,263.03