Finding the Third Proportional to 310,980 and 440,404.50

Step by Step Solution

1. Step 1: Write the proportion equation
   310,980 : 440,404.50 = 440,404.50 : x
2. Step 2: Convert to fraction form
   310,980/440,404.50 = 440,404.50/x
3. Step 3: Cross multiply
   310,980x = 440,404.50 × 440,404.50
4. Step 4: Simplify right side
   310,980x = 193,956,123,620.25
5. Step 5: Solve for x
   x = 193,956,123,620.25/310,980
6. Step 6: Final answer
   x = 623,693.24