Finding the Third Proportional to 310,914.70 and 659,196.35

Step by Step Solution

1. Step 1: Write the proportion equation
   310,914.70 : 659,196.35 = 659,196.35 : x
2. Step 2: Convert to fraction form
   310,914.70/659,196.35 = 659,196.35/x
3. Step 3: Cross multiply
   310,914.70x = 659,196.35 × 659,196.35
4. Step 4: Simplify right side
   310,914.70x = 434,539,829,913.31
5. Step 5: Solve for x
   x = 434,539,829,913.31/310,914.70
6. Step 6: Final answer
   x = 1,397,617.50