Finding the Fourth Proportional to 496,728.72, 745,218.84 and 141,744

Step by Step Solution

1. Step 1: Write the proportion equation
   496,728.72 : 745,218.84 = 141,744 : x
2. Step 2: Convert to fraction form
   496,728.72/745,218.84 = 141,744/x
3. Step 3: Cross multiply
   496,728.72x = 745,218.84 × 141,744
4. Step 4: Simplify right side
   496,728.72x = 105,630,299,256.96
5. Step 5: Solve for x
   x = 105,630,299,256.96/496,728.72
6. Step 6: Final answer
   x = 212,651.89