Finding the Third Proportional to 215,425.50 and 340,959

Step by Step Solution

1. Step 1: Write the proportion equation
   215,425.50 : 340,959 = 340,959 : x
2. Step 2: Convert to fraction form
   215,425.50/340,959 = 340,959/x
3. Step 3: Cross multiply
   215,425.50x = 340,959 × 340,959
4. Step 4: Simplify right side
   215,425.50x = 116,253,039,681
5. Step 5: Solve for x
   x = 116,253,039,681/215,425.50
6. Step 6: Final answer
   x = 539,643.82