Finding the Third Proportional to 139,470.75 and 304,861.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,470.75 : 304,861.50 = 304,861.50 : x
2. Step 2: Convert to fraction form
   139,470.75/304,861.50 = 304,861.50/x
3. Step 3: Cross multiply
   139,470.75x = 304,861.50 × 304,861.50
4. Step 4: Simplify right side
   139,470.75x = 92,940,534,182.25
5. Step 5: Solve for x
   x = 92,940,534,182.25/139,470.75
6. Step 6: Final answer
   x = 666,380.11