Finding the Third Proportional to 491,613 and 672,805.50

Step by Step Solution

1. Step 1: Write the proportion equation
   491,613 : 672,805.50 = 672,805.50 : x
2. Step 2: Convert to fraction form
   491,613/672,805.50 = 672,805.50/x
3. Step 3: Cross multiply
   491,613x = 672,805.50 × 672,805.50
4. Step 4: Simplify right side
   491,613x = 452,667,240,830.25
5. Step 5: Solve for x
   x = 452,667,240,830.25/491,613
6. Step 6: Final answer
   x = 920,779.64