Finding the Third Proportional to 335,739 and 721,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   335,739 : 721,171.50 = 721,171.50 : x
2. Step 2: Convert to fraction form
   335,739/721,171.50 = 721,171.50/x
3. Step 3: Cross multiply
   335,739x = 721,171.50 × 721,171.50
4. Step 4: Simplify right side
   335,739x = 520,088,332,412.25
5. Step 5: Solve for x
   x = 520,088,332,412.25/335,739
6. Step 6: Final answer
   x = 1,549,085.25