Finding the Third Proportional to 306,757.50 and 656,160

Step by Step Solution

1. Step 1: Write the proportion equation
   306,757.50 : 656,160 = 656,160 : x
2. Step 2: Convert to fraction form
   306,757.50/656,160 = 656,160/x
3. Step 3: Cross multiply
   306,757.50x = 656,160 × 656,160
4. Step 4: Simplify right side
   306,757.50x = 430,545,945,600
5. Step 5: Solve for x
   x = 430,545,945,600/306,757.50
6. Step 6: Final answer
   x = 1,403,538.45