Finding the Third Proportional to 215,947.50 and 338,724

Step by Step Solution

1. Step 1: Write the proportion equation
   215,947.50 : 338,724 = 338,724 : x
2. Step 2: Convert to fraction form
   215,947.50/338,724 = 338,724/x
3. Step 3: Cross multiply
   215,947.50x = 338,724 × 338,724
4. Step 4: Simplify right side
   215,947.50x = 114,733,948,176
5. Step 5: Solve for x
   x = 114,733,948,176/215,947.50
6. Step 6: Final answer
   x = 531,304.82