Finding the Third Proportional to 490,839.50 and 720,096.50

Step by Step Solution

1. Step 1: Write the proportion equation
   490,839.50 : 720,096.50 = 720,096.50 : x
2. Step 2: Convert to fraction form
   490,839.50/720,096.50 = 720,096.50/x
3. Step 3: Cross multiply
   490,839.50x = 720,096.50 × 720,096.50
4. Step 4: Simplify right side
   490,839.50x = 518,538,969,312.25
5. Step 5: Solve for x
   x = 518,538,969,312.25/490,839.50
6. Step 6: Final answer
   x = 1,056,432.84