Finding the Fourth Proportional to 525,185.82, 787,778.76 and 419,509.98

Step by Step Solution

1. Step 1: Write the proportion equation
   525,185.82 : 787,778.76 = 419,509.98 : x
2. Step 2: Convert to fraction form
   525,185.82/787,778.76 = 419,509.98/x
3. Step 3: Cross multiply
   525,185.82x = 787,778.76 × 419,509.98
4. Step 4: Simplify right side
   525,185.82x = 330,481,051,852.03
5. Step 5: Solve for x
   x = 330,481,051,852.03/525,185.82
6. Step 6: Final answer
   x = 629,264.99