Finding the Fourth Proportional to 1,101.86, 1,520.42 and 629.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.86 : 1,520.42 = 629.82 : x
2. Step 2: Convert to fraction form
   1,101.86/1,520.42 = 629.82/x
3. Step 3: Cross multiply
   1,101.86x = 1,520.42 × 629.82
4. Step 4: Simplify right side
   1,101.86x = 957,590.92
5. Step 5: Solve for x
   x = 957,590.92/1,101.86
6. Step 6: Final answer
   x = 869.07