Finding the Fourth Proportional to 2,104.86, 3,155.85 and 1,129.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.86 : 3,155.85 = 1,129.98 : x
2. Step 2: Convert to fraction form
   2,104.86/3,155.85 = 1,129.98/x
3. Step 3: Cross multiply
   2,104.86x = 3,155.85 × 1,129.98
4. Step 4: Simplify right side
   2,104.86x = 3,566,047.38
5. Step 5: Solve for x
   x = 3,566,047.38/2,104.86
6. Step 6: Final answer
   x = 1,694.20