Finding the Fourth Proportional to 550,571.99, 759,824.25 and 308,870.21

Step by Step Solution

1. Step 1: Write the proportion equation
   550,571.99 : 759,824.25 = 308,870.21 : x
2. Step 2: Convert to fraction form
   550,571.99/759,824.25 = 308,870.21/x
3. Step 3: Cross multiply
   550,571.99x = 759,824.25 × 308,870.21
4. Step 4: Simplify right side
   550,571.99x = 234,687,076,401.89
5. Step 5: Solve for x
   x = 234,687,076,401.89/550,571.99
6. Step 6: Final answer
   x = 426,260.48