Finding the Third Proportional to 310,003.50 and 438,774

Step by Step Solution

1. Step 1: Write the proportion equation
   310,003.50 : 438,774 = 438,774 : x
2. Step 2: Convert to fraction form
   310,003.50/438,774 = 438,774/x
3. Step 3: Cross multiply
   310,003.50x = 438,774 × 438,774
4. Step 4: Simplify right side
   310,003.50x = 192,522,623,076
5. Step 5: Solve for x
   x = 192,522,623,076/310,003.50
6. Step 6: Final answer
   x = 621,033.71