Finding the Fourth Proportional to 816,200.10, 1,224,300.15 and 629,576.10

Step by Step Solution

1. Step 1: Write the proportion equation
   816,200.10 : 1,224,300.15 = 629,576.10 : x
2. Step 2: Convert to fraction form
   816,200.10/1,224,300.15 = 629,576.10/x
3. Step 3: Cross multiply
   816,200.10x = 1,224,300.15 × 629,576.10
4. Step 4: Simplify right side
   816,200.10x = 770,790,113,666.42
5. Step 5: Solve for x
   x = 770,790,113,666.42/816,200.10
6. Step 6: Final answer
   x = 944,364.15