Finding the Fourth Proportional to 1,336.15, 1,992.47 and 1,229.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,336.15 : 1,992.47 = 1,229.77 : x
2. Step 2: Convert to fraction form
   1,336.15/1,992.47 = 1,229.77/x
3. Step 3: Cross multiply
   1,336.15x = 1,992.47 × 1,229.77
4. Step 4: Simplify right side
   1,336.15x = 2,450,279.83
5. Step 5: Solve for x
   x = 2,450,279.83/1,336.15
6. Step 6: Final answer
   x = 1,833.84