Finding the Third Proportional to 307,012.50 and 660,681

Step by Step Solution

1. Step 1: Write the proportion equation
   307,012.50 : 660,681 = 660,681 : x
2. Step 2: Convert to fraction form
   307,012.50/660,681 = 660,681/x
3. Step 3: Cross multiply
   307,012.50x = 660,681 × 660,681
4. Step 4: Simplify right side
   307,012.50x = 436,499,383,761
5. Step 5: Solve for x
   x = 436,499,383,761/307,012.50
6. Step 6: Final answer
   x = 1,421,764.21