Finding the Fourth Proportional to 622,687.82, 857,499.82 and 540,978.80

Step by Step Solution

1. Step 1: Write the proportion equation
   622,687.82 : 857,499.82 = 540,978.80 : x
2. Step 2: Convert to fraction form
   622,687.82/857,499.82 = 540,978.80/x
3. Step 3: Cross multiply
   622,687.82x = 857,499.82 × 540,978.80
4. Step 4: Simplify right side
   622,687.82x = 463,889,217,983.87
5. Step 5: Solve for x
   x = 463,889,217,983.87/622,687.82
6. Step 6: Final answer
   x = 744,978.79