Finding the Fourth Proportional to 550,300.10, 824,672.55 and 339,311.30

Step by Step Solution

1. Step 1: Write the proportion equation
   550,300.10 : 824,672.55 = 339,311.30 : x
2. Step 2: Convert to fraction form
   550,300.10/824,672.55 = 339,311.30/x
3. Step 3: Cross multiply
   550,300.10x = 824,672.55 × 339,311.30
4. Step 4: Simplify right side
   550,300.10x = 279,820,715,014.82
5. Step 5: Solve for x
   x = 279,820,715,014.82/550,300.10
6. Step 6: Final answer
   x = 508,487.49