Finding the Fourth Proportional to 748,939.10, 1,123,297.89 and 275,513.73

Step by Step Solution

1. Step 1: Write the proportion equation
   748,939.10 : 1,123,297.89 = 275,513.73 : x
2. Step 2: Convert to fraction form
   748,939.10/1,123,297.89 = 275,513.73/x
3. Step 3: Cross multiply
   748,939.10x = 1,123,297.89 × 275,513.73
4. Step 4: Simplify right side
   748,939.10x = 309,483,991,575.03
5. Step 5: Solve for x
   x = 309,483,991,575.03/748,939.10
6. Step 6: Final answer
   x = 413,229.85