Finding the Third Proportional to 310,084.50 and 640,095

Step by Step Solution

1. Step 1: Write the proportion equation
   310,084.50 : 640,095 = 640,095 : x
2. Step 2: Convert to fraction form
   310,084.50/640,095 = 640,095/x
3. Step 3: Cross multiply
   310,084.50x = 640,095 × 640,095
4. Step 4: Simplify right side
   310,084.50x = 409,721,609,025
5. Step 5: Solve for x
   x = 409,721,609,025/310,084.50
6. Step 6: Final answer
   x = 1,321,322.44