Finding the Third Proportional to 139,980.75 and 303,289.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,980.75 : 303,289.50 = 303,289.50 : x
2. Step 2: Convert to fraction form
   139,980.75/303,289.50 = 303,289.50/x
3. Step 3: Cross multiply
   139,980.75x = 303,289.50 × 303,289.50
4. Step 4: Simplify right side
   139,980.75x = 91,984,520,810.25
5. Step 5: Solve for x
   x = 91,984,520,810.25/139,980.75
6. Step 6: Final answer
   x = 657,122.65