Finding the Fourth Proportional to 1,372.42, 2,058.72 and 550.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.42 : 2,058.72 = 550.86 : x
2. Step 2: Convert to fraction form
   1,372.42/2,058.72 = 550.86/x
3. Step 3: Cross multiply
   1,372.42x = 2,058.72 × 550.86
4. Step 4: Simplify right side
   1,372.42x = 1,134,066.50
5. Step 5: Solve for x
   x = 1,134,066.50/1,372.42
6. Step 6: Final answer
   x = 826.33